Key Facts

From 1959 to 2025, long-record stations in Finland warmed by +0.39 C per decade (+0.70 F) (95 percent interval +0.25 to +0.53 C), from 68 stations measured against each station's own 1961-1990 mean.
The latest year in the series for Finland, 2025, was +2.80 C against the 1961-1990 mean.
In Finland the daily minimum rose faster than the daily maximum, by 0.04 C per decade (the two intervals overlap).
Of 69 stations in Finland with at least 50 complete years of record, 61 had 2020 as their warmest year.
In Finland, the mean annual temperature of 59 stations changed by +2.00 C between the 1961-1990 and 2011-2025 periods.

Warming

Finland, against 1961-1990

Annual mean temperature of the long-record stations in Finland as a difference from each station's own 1961-1990 mean, 1959 to 2025. 68 stations in 9 grid cells of 5 by 5 degrees, area weighted. Years with too little coverage are left blank and the line or columns are not drawn across the gap; the earliest and latest years can rest on fewer of these stations than the middle years. The station set does not change from year to year. Zero line: each station's own 1961-1990 mean.

Annual mean temperature against the 1961-1990 mean, Finland
Year	Difference from the 1961-1990 mean
1959	+1.07 C
1960	+0.20 C
1961	+1.61 C
1962	-0.51 C
1963	-0.52 C
1964	+0.18 C
1965	-0.49 C
1966	-1.59 C
1967	+0.46 C
1968	-0.70 C
1969	-0.87 C
1970	-0.67 C
1971	-0.49 C
1972	+1.20 C
1973	+0.30 C
1974	+1.76 C
1975	+1.58 C
1976	-0.94 C
1977	-0.30 C
1978	-1.25 C
1979	-0.28 C
1980	-0.52 C
1981	-0.48 C
1982	+0.34 C
1983	+0.57 C
1984	+0.96 C
1985	-1.89 C
1986	-0.35 C
1987	-1.62 C
1988	+0.46 C
1989	+2.08 C
1990	+1.65 C
1991	+1.02 C
1992	+1.30 C
1993	+0.48 C
1994	+0.42 C
1995	+0.94 C
1996	+0.17 C
1997	+0.93 C
1998	+0.16 C
1999	+1.09 C
2000	+2.11 C
2001	+0.88 C
2002	+0.91 C
2003	+1.05 C
2004	+1.29 C
2005	+1.76 C
2006	+1.58 C
2007	+1.76 C
2008	+2.04 C
2009	+1.12 C
2010	-0.28 C
2011	+2.05 C
2012	+0.68 C
2013	+1.81 C
2014	+2.30 C
2015	+2.66 C
2016	+1.82 C
2017	+1.40 C
2018	+1.88 C
2019	+1.67 C
2020	+3.21 C
2021	+1.34 C
2022	+2.18 C
2023	+1.56 C
2024	+2.36 C
2025	+2.80 C

From 1959 to 2025, the long-record stations in Finland warmed by +0.39 C per decade (+0.70 F) (95 percent interval +0.25 to +0.53 C), from 68 stations in 9 grid cells of 5 by 5 degrees, each measured against its own 1961-1990 mean.

The latest year in the series, 2025, was +2.8 C (+5.0 F) against the 1961-1990 mean.

The five warmest years in the series are 2020 (+3.21 C), 2025 (+2.80 C), 2015 (+2.66 C), 2024 (+2.36 C) and 2014 (+2.30 C).

Trend

Warming trend per decade, Finland
Measure	Trend per decade (C)	95% interval (C)	Years	Stations
Annual mean temperature	+0.39	+0.25 to +0.53	1959 to 2025	68

Warmest and coolest years in the series

Warmest and coolest years of the 1961-1990 anomaly series, Finland
Rank	Warmest year	Difference from mean	Coolest year	Difference from mean
1	2020	+3.21 C	1985	-1.89 C
2	2025	+2.80 C	1987	-1.62 C
3	2015	+2.66 C	1966	-1.59 C
4	2024	+2.36 C	1978	-1.25 C
5	2014	+2.30 C	1976	-0.94 C

68 stations in 9 grid cells of 5 by 5 degrees. Each station is compared with its own 1961-1990 mean, so stations at different heights and latitudes can be averaged. Stations are averaged within each grid cell and cells are weighted by the cosine of latitude.

Warmest Years

Finland, 69 stations

For each year 1938 to 2025, the number of the 69 stations in Finland with at least 50 complete years of record that had it as their warmest year on record. A station counts once, so the bars add up to 69.

Stations that had each year as their warmest on record, Finland
Year	Stations with this as their warmest year
1938	1
1939	0
1940	0
1941	0
1942	0
1943	0
1944	0
1945	0
1946	0
1947	0
1948	0
1949	0
1950	0
1951	0
1952	0
1953	0
1954	0
1955	0
1956	0
1957	0
1958	0
1959	0
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	1
2009	0
2010	0
2011	1
2012	0
2013	0
2014	0
2015	2
2016	0
2017	0
2018	0
2019	0
2020	61
2021	0
2022	0
2023	0
2024	2
2025	1

Of the 69 stations in Finland with at least 50 complete years of record, 61 (88.4%) had 2020 as their warmest year on record.

The years that were the warmest on record at the most stations are 2020 (61 stations), 2024 (2 stations), 2015 (2 stations), 2025 (1 station) and 2011 (1 station).

64 of the 69 stations (92.8%) had their warmest year in the 2020s. That decade is not over.

By decade

Stations by the decade of their warmest year, Finland
Decade	Stations with their warmest year in it	Share of stations	Stations with one of their five warmest years in it
1930s	1	1.4%	1
1940s	0	0.0%	0
1950s	0	0.0%	0
1960s	0	0.0%	0
1970s	0	0.0%	4
1980s	0	0.0%	17
1990s	0	0.0%	2
2000s	1	1.4%	39
2010s	3	4.3%	108
2020s (to date)	64	92.8%	174

The set is the 69 stations with at least 50 complete years (all twelve months with 20 or more days of maximum and minimum). A station's warmest year is the one with the highest annual mean temperature, a tie going to the later year. The count describes these stations, not the whole area.

Days and Nights

Finland, against 1961-1990

Annual mean daily maximum, daily minimum and day-night range of the long-record stations in Finland as differences from each station's own 1961-1990 mean, 1959 to 2025. 68 stations in 9 grid cells of 5 by 5 degrees, area weighted. The station set does not change from year to year.

Daily maximum, daily minimum and day-night range against the 1961-1990 mean, Finland
Year	Daily maximum	Daily minimum	Day-night range (maximum minus minimum)
1959	+1.14 C	+1.00 C	+0.13 C
1960	+0.33 C	+0.08 C	+0.26 C
1961	+1.43 C	+1.78 C	-0.35 C
1962	-0.55 C	-0.48 C	-0.08 C
1963	-0.05 C	-0.99 C	+0.94 C
1964	+0.31 C	+0.05 C	+0.26 C
1965	-0.53 C	-0.44 C	-0.09 C
1966	-1.60 C	-1.57 C	-0.03 C
1967	+0.30 C	+0.62 C	-0.33 C
1968	-0.69 C	-0.70 C	+0.01 C
1969	-0.54 C	-1.20 C	+0.67 C
1970	-0.58 C	-0.77 C	+0.18 C
1971	-0.36 C	-0.62 C	+0.26 C
1972	+0.99 C	+1.40 C	-0.41 C
1973	+0.42 C	+0.17 C	+0.25 C
1974	+1.34 C	+2.18 C	-0.84 C
1975	+1.69 C	+1.47 C	+0.23 C
1976	-0.65 C	-1.23 C	+0.58 C
1977	-0.54 C	-0.05 C	-0.49 C
1978	-1.08 C	-1.43 C	+0.35 C
1979	-0.38 C	-0.18 C	-0.21 C
1980	-0.22 C	-0.81 C	+0.59 C
1981	-0.46 C	-0.50 C	+0.04 C
1982	+0.29 C	+0.40 C	-0.11 C
1983	+0.62 C	+0.53 C	+0.09 C
1984	+0.80 C	+1.11 C	-0.31 C
1985	-1.76 C	-2.03 C	+0.27 C
1986	-0.49 C	-0.22 C	-0.27 C
1987	-1.61 C	-1.63 C	+0.02 C
1988	+0.45 C	+0.48 C	-0.03 C
1989	+1.84 C	+2.31 C	-0.48 C
1990	+1.44 C	+1.87 C	-0.43 C
1991	+0.78 C	+1.26 C	-0.48 C
1992	+1.06 C	+1.53 C	-0.47 C
1993	+0.29 C	+0.68 C	-0.40 C
1994	+0.44 C	+0.41 C	+0.03 C
1995	+0.83 C	+1.06 C	-0.23 C
1996	+0.24 C	+0.10 C	+0.14 C
1997	+1.06 C	+0.80 C	+0.25 C
1998	+0.02 C	+0.31 C	-0.29 C
1999	+1.04 C	+1.14 C	-0.10 C
2000	+1.84 C	+2.39 C	-0.55 C
2001	+0.83 C	+0.93 C	-0.10 C
2002	+1.12 C	+0.69 C	+0.43 C
2003	+1.10 C	+1.00 C	+0.10 C
2004	+1.22 C	+1.37 C	-0.15 C
2005	+1.70 C	+1.83 C	-0.12 C
2006	+1.65 C	+1.52 C	+0.13 C
2007	+1.63 C	+1.89 C	-0.26 C
2008	+1.68 C	+2.40 C	-0.72 C
2009	+0.96 C	+1.27 C	-0.31 C
2010	-0.21 C	-0.35 C	+0.14 C
2011	+1.99 C	+2.11 C	-0.12 C
2012	+0.44 C	+0.92 C	-0.48 C
2013	+1.99 C	+1.63 C	+0.35 C
2014	+2.07 C	+2.52 C	-0.45 C
2015	+2.32 C	+2.99 C	-0.66 C
2016	+1.60 C	+2.04 C	-0.44 C
2017	+1.08 C	+1.73 C	-0.65 C
2018	+2.14 C	+1.63 C	+0.50 C
2019	+1.71 C	+1.64 C	+0.07 C
2020	+3.08 C	+3.35 C	-0.27 C
2021	+1.39 C	+1.29 C	+0.10 C
2022	+2.16 C	+2.20 C	-0.04 C
2023	+1.69 C	+1.43 C	+0.26 C
2024	+2.42 C	+2.30 C	+0.12 C
2025	+2.77 C	+2.84 C	-0.07 C

From 1959 to 2025, the daily maximum in Finland changed by +0.37 C per decade (+0.67 F) (95 percent interval +0.24 to +0.51 C) and the daily minimum by +0.41 C per decade (+0.74 F) (95 percent interval +0.26 to +0.56 C), from 68 stations.

The daily minimum rose faster, by 0.04 C per decade more than the daily maximum; the two intervals overlap, so the data do not separate them.

The day-night range (daily maximum minus daily minimum) changed by -0.04 C per decade (95 percent interval -0.08 to +0.01 C), an interval that includes zero.

Trends per decade

Trends in the daily maximum, the daily minimum and the day-night range, Finland
Measure	Trend per decade (C)	95% interval (C)	Years	Stations
Daily maximum	+0.37	+0.24 to +0.51	1959 to 2025	68
Daily minimum	+0.41	+0.26 to +0.56	1959 to 2025	68
Day-night range (maximum minus minimum)	-0.04	-0.08 to +0.01	1959 to 2025	68

The day-night range is the daily maximum minus the daily minimum, so a falling range means the minimum rose by more than the maximum. Intervals allow for year to year persistence in the series.

Hot Days, Warm Nights and Frost Days by Decade: Finland

Up to 48 stations per measure, fixed sets

In Finland, the mean number of days with a daily maximum at or above 30 C (86 F) per year at 48 stations rose from 0.1 to 1.6 between the 1960s and the 2010s; the 2020s so far (6 years) average 2.0.
In Finland, the mean number of days with a daily maximum at or above 35 C (95 F) per year at 48 stations was 0.0 in both between the 1960s and the 2010s; the 2020s so far (6 years) average 0.0.
In Finland, the mean number of days with a daily maximum at or above 40 C (104 F) per year at 48 stations was 0.0 in both between the 1960s and the 2010s; the 2020s so far (6 years) average 0.0.
In Finland, the mean number of warm nights, with a daily minimum at or above 20 C (68 F) per year at 48 stations rose from 0.0 to 0.7 between the 1960s and the 2010s; the 2020s so far (6 years) average 0.6.
In Finland, the mean number of frost days, with a daily minimum at or below 0 C (32 F) per year at 48 stations fell from 184.3 to 162.1 between the 1960s and the 2010s; the 2020s so far (6 years) average 161.4.
In Finland, the mean number of ice days, with a daily maximum at or below 0 C (32 F) per year at 48 stations fell from 105.1 to 80.1 between the 1960s and the 2010s; the 2020s so far (6 years) average 74.3.

Days at or above 30 C

Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Finland. The same 48 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.

Days at or above 35 C

Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Finland. The same 48 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.

Days at or above 40 C

Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Finland. The same 48 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.

Tropical nights (min at or above 20 C)

Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), Finland. The same 48 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.

Frost days (min at or below 0 C)

Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Finland. The same 48 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.

Ice days (max at or below 0 C)

Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Finland. The same 48 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.

Each measure counts days in complete years only. A station is in a measure's set when it has complete years in every decade from the 1960s, so each chart compares the same places over time. A grey bar is a decade that is not over.

Heavy Rain and Dry Spells by Decade: Finland

102 stations in the annual rain series

In Finland, annual rain at 102 stations is shown as a percent difference from each station's own 1961-1990 mean, for 67 years from 1959 to 2025.
The trend in annual rain is +2.4 percent per decade (95 percent interval +1.0 to +3.8), fitted to 67 years from 1959 to 2025.
In Finland, the share of a year's rain that fell in its wettest five days rose from 8.9 to 9.1 percent between the 1960s and the 2020s at 35 stations.
In Finland, the mean number of days with 25 mm (1.0 in) or more of rain per year rose from 0.79 to 1.60 between the 1960s and the 2020s.
In Finland, the mean number of days with 50 mm (2.0 in) or more of rain per year rose from 0.05 to 0.17 between the 1960s and the 2020s.
In Finland, the mean number of days with 100 mm (3.9 in) or more of rain per year was 0.00 in both between the 1960s and the 2020s.
In Finland, the mean longest dry spell of the year, in days with less than 1 mm of rain in a row, fell from 23.7 to 21.1 days between the 1960s and the 2020s, over the same 35 stations in every decade.

Annual rain against the 1961-1990 mean

Annual rain in Finland as a percent difference from each station's own 1961-1990 mean, for 102 stations with a long record, 1959 to 2025. Stations are averaged in 5 degree grid cells and the cells are weighted by the cosine of latitude.

Annual rain as a percent difference from the 1961-1990 mean, Finland
Year	Annual rain, percent difference from the mean
1959	-17.2%
1960	-3.5%
1961	10.5%
1962	9.1%
1963	-16.0%
1964	-13.3%
1965	-1.5%
1966	-0.4%
1967	6.9%
1968	-6.5%
1969	-15.5%
1970	-3.2%
1971	-13.5%
1972	-8.5%
1973	-7.1%
1974	25.3%
1975	-12.7%
1976	-24.0%
1977	10.3%
1978	-19.0%
1979	3.5%
1980	-3.3%
1981	26.1%
1982	-5.2%
1983	12.4%
1984	10.0%
1985	0.3%
1986	7.2%
1987	1.6%
1988	10.4%
1989	2.7%
1990	2.4%
1991	10.1%
1992	18.2%
1993	-0.2%
1994	2.3%
1995	1.2%
1996	-0.3%
1997	-2.9%
1998	22.3%
1999	6.1%
2000	15.8%
2001	9.8%
2002	-12.6%
2003	-4.4%
2004	15.3%
2005	8.5%
2006	-3.9%
2007	16.5%
2008	25.3%
2009	-4.4%
2010	-0.5%
2011	15.6%
2012	33.6%
2013	0.9%
2014	-0.3%
2015	17.5%
2016	6.7%
2017	7.9%
2018	-18.1%
2019	14.8%
2020	20.0%
2021	7.5%
2022	-3.8%
2023	22.2%
2024	5.9%
2025	3.2%

Share of the year's rain in its wettest five days

Mean share of a year's rain that fell in its wettest five days, by decade, Finland, 1960s to 2020s, for 35 stations that report complete years in every decade.

Days with 25 mm or more rain

Mean number of days with 25 mm (1.0 in) or more of rain per year, by decade, Finland, 1960s to 2020s, for a fixed set of stations that report complete years in every decade.

Days with 50 mm or more rain

Mean number of days with 50 mm (2.0 in) or more of rain per year, by decade, Finland, 1960s to 2020s, for a fixed set of stations that report complete years in every decade.

Days with 100 mm or more rain

Mean number of days with 100 mm (3.9 in) or more of rain per year, by decade, Finland, 1960s to 2020s, for a fixed set of stations that report complete years in every decade.

Longest dry spell of the year

Mean length in days of the longest run of days with less than 1 mm of rain in a year, by decade, Finland, 1960s to 2020s, over the same 35 stations in every decade.

The annual rain series uses stations with at least 50 complete years since 1951 and a 1961-1990 baseline. The decade charts use fixed sets of stations, the same in every decade from the 1960s. A dry day has less than 1 mm (0.04 in) of rain.

The New Normal

Finland, 1961-1990 against 2011-2025

Change in annual mean temperature from 1961-1990 to 2011-2025 at 56 stations in Finland, one dot per station (the stations with the most complete years, at most one per half degree cell). The scope figures use 59 stations with at least 20 complete years in 1961-1990 and in 1991-2020 and at least 8 in 2011-2025. Made with Natural Earth.

Change in annual mean temperature from 1961-1990 to 2011-2025, Finland
Station	Change in mean temperature
Mustasaari Valassaaret	+2.6 C (+4.7 F)
Vesanto Sonkari	+2.5 C (+4.6 F)
Kuusamo Kiutakongas	+2.5 C (+4.5 F)
Pello Kk Museotie	+2.3 C (+4.2 F)
Sodankyla AWS	+2.3 C (+4.1 F)
Savukoski Kk	+2.3 C (+4.1 F)
Inkoo Bagaskar	+2.3 C (+4.1 F)
Maaninka Halola	+2.3 C (+4.1 F)
Haapavesi Mustikkamaki	+2.3 C (+4.1 F)
Liperi Joensuun Lentoasema	+2.2 C (+4.0 F)
Hyvinkaa Hyvinkaankyla	+2.2 C (+4.0 F)
Seinajoki Pelmaa	+2.2 C (+4.0 F)
Kouvola Utti Lentoportintie	+2.2 C (+4.0 F)
Ahtari Myllymaki	+2.2 C (+3.9 F)
Parainen Uto	+2.2 C (+3.9 F)
Tohmajarvi Kemie	+2.2 C (+3.9 F)
Heinola Asemantaus	+2.1 C (+3.9 F)
Sodankyla Lokka	+2.1 C (+3.9 F)
Kajaani Lentoasema-1	+2.1 C (+3.8 F)
Kotka Rankki	+2.1 C (+3.8 F)
Juupajoki Hyytiala	+2.1 C (+3.8 F)
Kauhava Lentokentta	+2.1 C (+3.8 F)
Joutsa Leivonmaki Savenaho	+2.1 C (+3.8 F)
Siilinjarvi Kuopion Lentoasema	+2.1 C (+3.8 F)
Inari Ivalo Lentoasema	+2.1 C (+3.8 F)
Lemland Nyhamn	+2.1 C (+3.7 F)
Hanko Russaro	+2.1 C (+3.7 F)
Karvia Alkkia	+2.1 C (+3.7 F)
Sodankyla Vuotso	+2.1 C (+3.7 F)
Jokioinen Jokioisten Observato	+2.1 C (+3.7 F)
Hanko Tvarminne	+2.1 C (+3.7 F)
Kankaanpaa Niinisalo Puolustus	+2.1 C (+3.7 F)
Helsinki Kaisaniemi AWS	+2.0 C (+3.7 F)
Siikajoki Revonlahti	+2.0 C (+3.6 F)
Hameenlinna Lammi Pappila	+2.0 C (+3.6 F)
Utsjoki Kevo	+2.0 C (+3.6 F)
Lohja Porla	+2.0 C (+3.6 F)
Jyvaskyla Lentoasema	+2.0 C (+3.6 F)
Ylitornio Meltosjarvi	+2.0 C (+3.6 F)
Jomala Maarianhaminan Lentoase	+2.0 C (+3.5 F)
Jamsa Halli Lentokentta	+2.0 C (+3.5 F)
Lappeenranta Lentoasema	+1.9 C (+3.5 F)
Mikkeli Lentoasema	+1.9 C (+3.5 F)
Juuka Niemela	+1.9 C (+3.5 F)
Punkaharju Laukansaari	+1.9 C (+3.4 F)
Rovaniemi Apukka	+1.9 C (+3.4 F)
Viitasaari Haapaniemi	+1.9 C (+3.4 F)
Vaala Pelso	+1.9 C (+3.4 F)
Kruunupyy Lentoasema	+1.9 C (+3.4 F)
Keminmaa Kemi-Tornion Lentoase	+1.9 C (+3.4 F)
Salo Karkka	+1.9 C (+3.3 F)
Kaarina Yltoinen	+1.8 C (+3.3 F)
Vierema Kaarakkala	+1.8 C (+3.2 F)
Lahti Laune	+1.7 C (+3.0 F)
Lieksa Lampela	+1.7 C (+3.0 F)
Utsjoki Nuorgam	+1.3 C (+2.4 F)

Across 59 stations in Finland with long records, the mean annual temperature was 2.8 C (37.0 F) in 1961-1990, 4.2 C (39.5 F) in 1991-2020 and 4.8 C (40.6 F) in 2011-2025, a change of +2.0 C (+3.6 F) from the first period to the latest.

Mean annual rain, from years with at least 329 days of rain data, was 565.3 mm (22.3 in) in 1961-1990, 604.4 mm (23.8 in) in 1991-2020 and 609.1 mm (24.0 in) in 2011-2025, a change of +7.7% from the first period to the latest.

Of the 56 stations on the map, 56 were warmer in 2011-2025 than in 1961-1990.

36 of the 40 stations on the map with a rain figure had more rain and 4 had less.

Three periods

Mean temperature and annual rain in three periods, Finland
Period	Mean temperature	Annual rain
1961-1990	2.8 C (37.0 F)	565.3 mm (22.3 in)
1991-2020	4.2 C (39.5 F)	604.4 mm (23.8 in)
2011-2025	4.8 C (40.6 F)	609.1 mm (24.0 in)
Change, 1991-2020 against 1961-1990	+1.4 C (+2.5 F)	+6.9%
Change, 2011-2025 against 1961-1990	+2.0 C (+3.6 F)	+7.7%

Based on 59 stations with at least 20 complete years in 1961-1990 and in 1991-2020 and at least 8 in 2011-2025. The periods 1991-2020 and 2011-2025 overlap. Scope means are weighted by grid cell, as in the warming series; rain counts years with at least 329 days of rain data.

Longest Hot, Cold, Wet and Dry Streaks: Finland

5 lists of 8

In Finland, the longest run of hot days in a row in the data is 1 day, at Lahti Laune (Finland), from 28 July 2010 to 28 July 2010.
In Finland, the longest run of frost days in a row in the data is 239 days, at Enontekio Kilpisjarvi Saana (Finland), from 29 September 2019 to 24 May 2020.
In Finland, the longest run of ice days in a row in the data is 235 days, at Enontekio Kilpisjarvi Saana (Finland), from 30 September 2019 to 21 May 2020.
In Finland, the longest run of dry days in a row in the data is 88 days, at Alavus Salonkyla (Finland), in 2003.
In Finland, the longest run of wet days in a row in the data is 28 days, at Sonkajarvi Sukeva (Finland), in 1974.

Longest run of days at or above 35 C

Consecutive days with a daily maximum at or above 35 C (95 F).

Longest run of days at or above 35 C, Finland: the 8 longest runs
Rank	Station	Country	Length	When
1	Lahti Laune	Finland	1 day	28 to 28 July 2010
2	Tohmajarvi Kemie	Finland	1 day	29 to 29 July 2010
3	Maaninka Halola	Finland	1 day	29 to 29 July 2010
4	Kuopio Ritoniemi	Finland	1 day	29 to 29 July 2010
5	Rautavaara Yla-Luosta	Finland	1 day	29 to 29 July 2010
6	Liperi Joensuun Lentoasema	Finland	1 day	29 to 29 July 2010
7	Lieksa Lampela	Finland	1 day	29 to 29 July 2010
8	Kuhmo Kalliojoki	Finland	1 day	29 to 29 July 2010

Longest run of frost days (minimum at or below 0 C)

Consecutive days with a daily minimum at or below 0 C (32 F).

Longest run of frost days (minimum at or below 0 C), Finland: the 10 longest runs
Rank	Station	Country	Length	When
1	Enontekio Kilpisjarvi Saana	Finland	239 days	29 September 2019 to 24 May 2020
2	Muonio Laukukero	Finland	237 days	29 September 2019 to 22 May 2020
3	Inari Saariselka Kaunispaa	Finland	227 days	8 October 2019 to 21 May 2020
4	Sodankyla Vuotso	Finland	225 days	26 September 1960 to 8 May 1961
5	Inari Toivoniemi	Finland	222 days	3 October 1960 to 12 May 1961
6	Salla Kk	Finland	220 days	5 October 1968 to 12 May 1969
7	Sodankyla Lokka	Finland	219 days	2 October 1960 to 8 May 1961
8	Salla Varriotunturi	Finland	219 days	28 September 1979 to 3 May 1980
9	Inari Ivalo Lentoasema	Finland	218 days	3 October 1960 to 8 May 1961
10	Inari Nellim-1	Finland	218 days	3 October 1960 to 8 May 1961

Longest run of ice days (maximum at or below 0 C)

Consecutive days with a daily maximum at or below 0 C (32 F).

Longest run of ice days (maximum at or below 0 C), Finland: the 10 longest runs
Rank	Station	Country	Length	When
1	Enontekio Kilpisjarvi Saana	Finland	235 days	30 September 2019 to 21 May 2020
2	Muonio Laukukero	Finland	189 days	10 October 2017 to 16 April 2018
3	Muonio Sammaltunturi	Finland	169 days	17 October 2017 to 3 April 2018
4	Kuusamo Rukatunturi	Finland	164 days	16 October 2023 to 27 March 2024
5	Inari Saariselka Kaunispaa	Finland	151 days	11 November 2017 to 10 April 2018
6	Pelkosenniemi Pyhatunturi	Finland	148 days	11 November 2017 to 7 April 2018
7	Sodankyla Vuotso	Finland	145 days	7 November 1965 to 31 March 1966
8	Sodankyla AWS	Finland	144 days	7 November 1965 to 30 March 1966
9	Salla Kk	Finland	144 days	7 November 1965 to 30 March 1966
10	Savukoski Kk	Finland	144 days	7 November 1965 to 30 March 1966

Longest dry spell (days under 1 mm of rain), within one year

Consecutive days with less than 1 mm (0.04 in) of rain, the longest run within a year. The dates are not kept, so the list gives the year (within the year).

Longest dry spell (days under 1 mm of rain), within one year, Finland: the 10 longest runs
Rank	Station	Country	Length	When
1	Alavus Salonkyla	Finland	88 days	within 2003
2	Leppavirta Sorsakoski Osmajarv	Finland	80 days	within 1969
3	Keminmaa Kemi-Tornion Lentoase	Finland	75 days	within 1974
4	Mustasaari Valassaaret	Finland	73 days	within 1964
5	Utsjoki Outakoski	Finland	72 days	within 1986
6	Juuka Niemela	Finland	64 days	within 1965
7	Kemijarvi Lomakyla	Finland	62 days	within 1990
8	Utsjoki Leppala	Finland	60 days	within 1990
9	Raakkyla Kk	Finland	58 days	within 1978
10	Oravainen Kimo	Finland	58 days	within 1986

Longest wet spell (days with 1 mm or more of rain), within one year

Consecutive days with 1 mm (0.04 in) or more of rain, the longest run within a year. The dates are not kept, so the list gives the year (within the year).

Longest wet spell (days with 1 mm or more of rain), within one year, Finland: the 10 longest runs
Rank	Station	Country	Length	When
1	Sonkajarvi Sukeva	Finland	28 days	within 1974
2	Heinavesi Hasumaki	Finland	27 days	within 1974
3	Kemijarvi Lomakyla	Finland	25 days	within 1992
4	Alavus Kattelus	Finland	24 days	within 1979
5	Hattula Lepaa-1	Finland	23 days	within 1979
6	Joutsa Parnamaki	Finland	23 days	within 1980
7	Kouvola Utti Lentoportintie	Finland	22 days	within 1974
8	Mantsala Hirvihaara	Finland	21 days	within 1974
9	Iitti Kausala	Finland	21 days	within 1974
10	Reisjarvi Levonpera	Finland	20 days	within 1995

A run belongs to the year it started in, even when it ran on into the next year. A station appears once per list, with its longest run in a complete year. Dry and wet spells are the longest run within a year. Lists use complete years only, so a long run in a year with gaps in the record is not counted.

Biggest One Day Temperature Swings: Finland

6 lists of 10

In Finland, the largest reported one day rise in the daily maximum is 30.0 C (54.0 F), at Utsjoki Kevo (Finland) on 23 December 1962.
In Finland, the largest reported one day drop in the daily maximum is 26.2 C (47.2 F), at Utsjoki Kevo (Finland) on 19 January 1962.
In Finland, the largest reported one day rise in the daily minimum is 34.5 C (62.1 F), at Kouvola Anjala (Finland) on 11 December 1973.
In Finland, the largest reported one day drop in the daily minimum is 29.7 C (53.5 F), at Kuusamo Kiutakongas (Finland) on 13 January 1988.
In Finland, the largest reported widest range between the high and the low of one day is 36.6 C (65.9 F), at Taivalkoski Kk (Finland) on 25 March 1980.
In Finland, the smallest reported narrowest range between the high and the low of one day is 0.0 C (0.0 F), at Sodankyla AWS (Finland) on 8 December 1952.

Caveat.Single readings can still be instrument errors that quality control missed. A station with one faulty value can top a list, so read each entry as a reported value, not as a confirmed event.

Biggest one day rise in the daily maximum

The largest increase in the daily maximum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day rise in the daily maximum, Finland
Rank	Station	Country	Value	Date
1	Utsjoki Kevo	Finland	30.0 C (54.0 F)	23 December 1962
2	Kuusamo Kiutakongas	Finland	29.1 C (52.4 F)	16 January 1967
3	Taivalkoski Kk	Finland	29.0 C (52.2 F)	16 January 1967
4	Muonio Alamuonio	Finland	28.7 C (51.7 F)	8 January 2016
5	Vihti Maasoja	Finland	28.2 C (50.8 F)	10 December 1973
6	Hattula Leteensuo	Finland	27.4 C (49.3 F)	10 December 1973
7	Sodankyla Vuotso	Finland	27.4 C (49.3 F)	2 January 1989
8	Muhos Kk Laitasaari	Finland	27.2 C (49.0 F)	10 December 1973
9	Nivala	Finland	27.0 C (48.6 F)	10 December 1973
10	Oulainen Ohineva	Finland	27.0 C (48.6 F)	10 December 1973

Biggest one day drop in the daily maximum

The largest decrease in the daily maximum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day drop in the daily maximum, Finland
Rank	Station	Country	Value	Date
1	Utsjoki Kevo	Finland	26.2 C (47.2 F)	19 January 1962
2	Sodankyla Vuotso	Finland	25.6 C (46.1 F)	14 January 2009
3	Inari Nellim	Finland	25.6 C (46.1 F)	14 January 2009
4	Sodankyla AWS	Finland	25.1 C (45.2 F)	5 December 1959
5	Rovaniemi Apukka	Finland	24.9 C (44.8 F)	17 December 1975
6	Siikajoki Revonlahti	Finland	24.1 C (43.4 F)	29 November 1980
7	Pello Kk Museotie	Finland	23.9 C (43.0 F)	6 January 1976
8	Inari Vayla	Finland	23.9 C (43.0 F)	24 January 1999
9	Maaninka Halola	Finland	23.7 C (42.7 F)	15 December 1962
10	Kuusamo Kiutakongas	Finland	23.6 C (42.5 F)	11 December 1988

Biggest one day rise in the daily minimum

The largest increase in the daily minimum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day rise in the daily minimum, Finland
Rank	Station	Country	Value	Date
1	Kouvola Anjala	Finland	34.5 C (62.1 F)	11 December 1973
2	Orimattila Kakela	Finland	34.0 C (61.2 F)	11 December 1973
3	Lammi Vestola	Finland	34.0 C (61.2 F)	11 December 1973
4	Lapinjarvi Ingermanninkyla	Finland	34.0 C (61.2 F)	11 December 1973
5	Vihti Maasoja	Finland	33.3 C (59.9 F)	11 December 1973
6	Valtimo Kk	Finland	33.3 C (59.9 F)	8 January 1978
7	Kuusamo Kiutakongas	Finland	33.2 C (59.8 F)	7 January 1978
8	Jyvaskyla Lentoasema	Finland	33.1 C (59.6 F)	11 December 1973
9	Hattula Leteensuo	Finland	32.9 C (59.2 F)	11 December 1973
10	Hyvinkaa Hyvinkaankyla	Finland	32.5 C (58.5 F)	11 December 1973

Biggest one day drop in the daily minimum

The largest decrease in the daily minimum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day drop in the daily minimum, Finland
Rank	Station	Country	Value	Date
1	Kuusamo Kiutakongas	Finland	29.7 C (53.5 F)	13 January 1988
2	Kittila Pokka	Finland	28.0 C (50.4 F)	11 January 2007
3	Sodankyla AWS	Finland	27.7 C (49.9 F)	11 January 1927
4	Sodankyla Lokka	Finland	27.7 C (49.9 F)	19 January 1964
5	Sodankyla Vuotso	Finland	27.3 C (49.1 F)	11 January 2007
6	Kittila Pulju	Finland	26.9 C (48.4 F)	11 January 2007
7	Utsjoki Kevo	Finland	26.4 C (47.5 F)	14 January 1993
8	Savukoski Kk	Finland	26.0 C (46.8 F)	19 January 1964
9	Muonio Alamuonio	Finland	26.0 C (46.8 F)	10 December 1965
10	Oulainen Ohineva	Finland	26.0 C (46.8 F)	28 November 1980

Widest range between the high and the low of one day

The largest difference between the highest and the lowest temperature of the same day. Values are in degrees Celsius with Fahrenheit beside them.

Widest range between the high and the low of one day, Finland
Rank	Station	Country	Value	Date
1	Taivalkoski Kk	Finland	36.6 C (65.9 F)	25 March 1980
2	Kuusamo Kiutakongas	Finland	36.5 C (65.7 F)	2 January 1989
3	Vihti Maasoja	Finland	35.2 C (63.4 F)	10 December 1973
4	Kouvola Anjala	Finland	35.0 C (63.0 F)	10 December 1973
5	Alajarvi Moksy-1	Finland	35.0 C (63.0 F)	10 December 1973
6	Orimattila Kakela	Finland	34.7 C (62.5 F)	10 December 1973
7	Lammi Vestola	Finland	34.6 C (62.3 F)	10 December 1973
8	Huittinen Lauttakyla	Finland	34.5 C (62.1 F)	10 December 1973
9	Hattula Leteensuo	Finland	34.4 C (61.9 F)	10 December 1973
10	Kauhava Lentokentta	Finland	34.4 C (61.9 F)	10 December 1973

Narrowest range between the high and the low of one day

The smallest difference between the highest and the lowest temperature of the same day. Values are in degrees Celsius with Fahrenheit beside them.

Narrowest range between the high and the low of one day, Finland
Rank	Station	Country	Value	Date
1	Sodankyla AWS	Finland	0.0 C (0.0 F)	8 December 1952
2	Parainen Uto	Finland	0.0 C (0.0 F)	13 January 1960
3	Vihti Maasoja	Finland	0.0 C (0.0 F)	1 January 1961
4	Taivalkoski Kk	Finland	0.0 C (0.0 F)	11 February 1961
5	Hyvinkaa Hyvinkaankyla	Finland	0.1 C (0.2 F)	13 February 1971
6	Orimattila Kakela	Finland	0.1 C (0.2 F)	6 January 1974
7	Tuusula Ruotsinkyla	Finland	0.1 C (0.2 F)	14 February 1990
8	Kuru Lansi-Aure	Finland	0.1 C (0.2 F)	7 January 1991
9	Salo Suomusjarvi	Finland	0.1 C (0.2 F)	21 December 1994
10	Juupajoki Hyytiala	Finland	0.1 C (0.2 F)	7 January 1998

Only stations with at least 10 complete years are listed, and a station appears once per list.

Hot and Dry Summers: Finland

107 stations with a 1961-1990 record

In Finland, the share of stations with a hot and dry summer is shown for each year from 1959 to 2026, for 107 stations with at least 20 complete summers in 1961-1990. Each year counts the stations of that set with a complete summer in the year.
In Finland, 6.5% of station summers in 1961-1990 were hot and dry (3,061 station summers).
In Finland, 10.8% of station summers in 2012-2026 were hot and dry (656 station summers).
In Finland, 2006 had the highest share: 96.4% of 56 stations (54).

A summer is hot when its mean daily maximum is at or above the station's 80th percentile of its 1961-1990 summers, and dry when its rain is at or below the 20th percentile. A summer is hot and dry when it is both. Summer is June to August north of the equator and December to February south of it, labelled by the year of its first month.

Share of stations with a hot and dry summer

Percent of stations with a complete summer that were both hot and dry, by year, Finland, 1959 to 2026, out of 107 stations with at least 20 complete summers in 1961-1990. Dashed line: the 1961-1990 level in this data, 6.5% of station summers. The most in one year was 96.4%. Dashed line: 1961-1990 level, 6.5%.

Share of stations with a hot and dry summer by year, Finland
Summer	Stations with a hot and dry summer
1959	45.0%
1960	3.8%
1961	0.0%
1962	0.0%
1963	1.1%
1964	0.0%
1965	0.0%
1966	6.3%
1967	0.0%
1968	0.0%
1969	60.6%
1970	22.3%
1971	0.0%
1972	5.6%
1973	51.9%
1974	0.0%
1975	15.9%
1976	0.0%
1977	0.0%
1978	0.0%
1979	0.9%
1980	24.3%
1981	0.0%
1982	0.0%
1983	0.9%
1984	0.0%
1985	0.0%
1986	0.9%
1987	0.0%
1988	1.0%
1989	1.9%
1990	0.0%
1991	0.0%
1992	3.0%
1993	0.0%
1994	27.8%
1995	24.7%
1996	0.0%
1997	47.7%
1998	0.0%
1999	42.7%
2000	0.0%
2001	7.2%
2002	11.9%
2003	17.2%
2004	0.0%
2005	4.8%
2006	96.4%
2007	0.0%
2008	0.0%
2009	0.0%
2010	35.0%
2011	7.3%
2012	0.0%
2013	5.0%
2014	11.9%
2015	0.0%
2016	0.0%
2017	0.0%
2018	51.2%
2019	42.9%
2020	2.2%
2021	4.4%
2022	29.5%
2023	2.3%
2024	4.3%
2025	11.1%
2026	0.0%

The ten most extreme station summers

The most extreme hot and dry station summers, Finland
Rank	Station	Country	Summer	Mean daily maximum vs 1961-1990	Rain, percent of 1961-1990 mean
1	Alajarvi Moksy-1	Finland	2006	+3.2 C (+5.8 F)	25%
2	Oulainen Ohineva	Finland	2006	+3.4 C (+6.1 F)	28%
3	Vesanto Sonkari	Finland	2006	+3.0 C (+5.5 F)	36%
4	Vaala Pelso	Finland	2006	+3.0 C (+5.3 F)	25%
5	Kauhava Lentokentta	Finland	2006	+3.2 C (+5.8 F)	31%
6	Lahti Laune	Finland	2010	+3.4 C (+6.0 F)	40%
7	Mikkeli Lentoasema	Finland	1997	+3.3 C (+5.9 F)	43%
8	Heinola Asemantaus	Finland	2010	+3.5 C (+6.4 F)	43%
9	Heinola Asemantaus	Finland	2006	+4.0 C (+7.1 F)	54%
10	Siikajoki Revonlahti	Finland	2006	+3.2 C (+5.7 F)	28%

Ranked by the temperature z score minus the rain z score against the station's own 1961-1990 mean and standard deviation (at least 0.3 C and 5 mm). A summer is labelled by the year of its first month.

Decade	Mean days per year
1960s	184.3
1970s	189.1
1980s	179.9
1990s	179.2
2000s	168.7
2010s	162.1
2020s (so far, 6 years)	161.4

Decade	Mean days per year
1960s	105.1
1970s	96.5
1980s	99.7
1990s	88.4
2000s	84.9
2010s	80.1
2020s (so far, 6 years)	74.3

Decade	Share of annual rain
1960s	8.9%
1970s	9.0%
1980s	9.0%
1990s	9.0%
2000s	9.2%
2010s	8.7%
2020s	9.1%

Decade	Mean days per year
1960s	0.79
1970s	0.92
1980s	1.29
1990s	1.20
2000s	1.34
2010s	1.19
2020s	1.60

Decade	Mean days per year
1960s	0.05
1970s	0.05
1980s	0.07
1990s	0.07
2000s	0.05
2010s	0.06
2020s	0.17

Decade	Mean days per year
1960s	0.00
1970s	0.00
1980s	0.00
1990s	0.00
2000s	0.00
2010s	0.00
2020s	0.00

Decade	Mean longest dry spell, days
1960s	23.7 days
1970s	23.3 days
1980s	21.0 days
1990s	23.1 days
2000s	22.5 days
2010s	22.8 days
2020s	21.1 days

Climate Trends in Finland