Norsk Threshold Days by Year (RSM00031388)

14 fixed thresholds counted per year at Norsk (RSM00031388): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norsk Thresholds

Norsk: days with 10 mm (0.39 in) or more of precipitation in 93 years, most in 1972 with 25.
Norsk: days with 25 mm (0.98 in) or more of precipitation in 92 years, most in 1963 with 9.
Norsk: nights with a minimum temperature at or below 0 C (32 F) in 90 years, most in 1954 with 235.
Norsk: nights with a minimum temperature at or below -10 C (14 F) in 90 years, most in 1960 with 173.
14 fixed thresholds have at least one qualifying day at Norsk.

Days at or above 30 C (86 F)

72 years with a qualifying day

Days per year at Norsk with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 20 in 1980.

Days at or above 30 C (86 F) per year at Norsk
Year	Days	Decade average
1938	1	4
1939	7	4
1940	4	7.8
1941	4	7.8
1942	4	7.8
1948	9	7.8
1949	18	7.8
1951	8	6.6
1952	2	6.6
1954	19	6.6
1955	3	6.6
1958	1	6.6
1960	3	5.2
1962	7	5.2
1963	6	5.2
1964	3	5.2
1965	2	5.2
1966	6	5.2
1967	3	5.2
1968	14	5.2
1969	3	5.2
1970	12	5
1973	5	5
1974	5	5
1975	6	5
1976	2	5
1977	7	5
1978	1	5
1979	2	5
1980	20	7.2
1981	1	7.2
1982	7	7.2
1983	1	7.2
1985	3	7.2
1986	7	7.2
1987	6	7.2
1988	16	7.2
1989	4	7.2
1990	6	7.6
1991	3	7.6
1992	6	7.6
1993	8	7.6
1994	3	7.6
1995	6	7.6
1996	16	7.6
1997	4	7.6
1998	11	7.6
1999	13	7.6
2000	14	9.1
2001	9	9.1
2002	7	9.1
2003	3	9.1
2004	5	9.1
2005	14	9.1
2006	5	9.1
2007	16	9.1
2008	15	9.1
2009	3	9.1
2010	10	11.1
2011	16	11.1
2012	16	11.1
2013	5	11.1
2014	8	11.1
2015	18	11.1
2016	3	11.1
2017	19	11.1
2018	5	11.1
2020	12	12.6
2021	6	12.6
2023	19	12.6
2024	12	12.6
2025	14	12.6

For each year, a bar from the first to the last day at Norsk meeting 30 C (86 F).

First to last qualifying date each year at Norsk
Year	First date	Last date
1938	1938-05-27	1938-05-27
1939	1939-07-09	1939-08-17
1940	1940-06-26	1940-07-11
1941	1941-06-12	1941-08-07
1942	1942-07-11	1942-07-14
1948	1948-06-29	1948-07-27
1949	1949-06-08	1949-08-03
1951	1951-06-17	1951-07-25
1952	1952-06-24	1952-08-11
1954	1954-06-26	1954-08-09
1955	1955-07-20	1955-08-22
1958	1958-07-15	1958-07-15
1960	1960-07-12	1960-07-29
1962	1962-06-22	1962-07-25
1963	1963-07-12	1963-07-27
1964	1964-07-03	1964-08-01
1965	1965-06-11	1965-06-14
1966	1966-05-17	1966-07-11
1967	1967-06-16	1967-07-31
1968	1968-06-21	1968-08-16
1969	1969-06-19	1969-07-11
1970	1970-06-26	1970-07-14
1973	1973-06-08	1973-07-06
1974	1974-07-09	1974-07-25
1975	1975-05-26	1975-07-08
1976	1976-07-13	1976-07-19
1977	1977-06-27	1977-07-19
1978	1978-06-30	1978-06-30
1979	1979-05-26	1979-07-04
1980	1980-06-28	1980-08-07
1981	1981-05-20	1981-05-20
1982	1982-06-26	1982-07-08
1983	1983-07-07	1983-07-07
1985	1985-07-01	1985-07-04
1986	1986-06-04	1986-07-26
1987	1987-05-31	1987-08-16
1988	1988-06-26	1988-08-05
1989	1989-07-05	1989-08-06
1990	1990-05-25	1990-07-21
1991	1991-07-01	1991-07-17
1992	1992-06-25	1992-07-16
1993	1993-07-14	1993-08-05
1994	1994-07-16	1994-07-18
1995	1995-06-10	1995-08-08
1996	1996-07-01	1996-07-24
1997	1997-07-16	1997-07-19
1998	1998-06-26	1998-08-21
1999	1999-06-22	1999-07-17
2000	2000-06-11	2000-08-14
2001	2001-05-12	2001-08-03
2002	2002-05-20	2002-07-10
2003	2003-06-11	2003-07-20
2004	2004-07-09	2004-07-13
2005	2005-06-04	2005-08-10
2006	2006-07-02	2006-08-04
2007	2007-07-01	2007-08-09
2008	2008-06-15	2008-07-26
2009	2009-05-24	2009-08-10
2010	2010-05-24	2010-08-27
2011	2011-06-15	2011-08-07
2012	2012-05-22	2012-08-06
2013	2013-06-23	2013-07-16
2014	2014-06-01	2014-08-23
2015	2015-06-12	2015-08-26
2016	2016-05-19	2016-07-23
2017	2017-06-21	2017-08-19
2018	2018-05-29	2018-07-28
2020	2020-07-01	2020-07-30
2021	2021-06-21	2021-07-22
2023	2023-06-27	2023-08-17
2024	2024-06-01	2024-08-15
2025	2025-05-27	2025-07-26

Every Fixed Threshold

Fixed thresholds at Norsk
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	72	20	1980	14
35 C (95 F): Days	3	3	2017	1
90 F (32.2 C): Days	34	9	2017	6
0 C (32 F): Ice days (max	80	166	1980	82
0 C (32 F): Frost days (min	90	235	1954	61
-10 C (14 F): Days with min	90	173	1960	42
-20 C (-4 F): Days with min	90	141	1952	34
-30 C (-22 F): Days with min	90	107	1952	25
-40 C (-40 F): Days with min	90	66	1969	2
20 C (68 F): Tropical nights (min	33	4	1977	2
10 mm (0.39 in): Days with 10 mm or more rain	93	25	1972	15
25 mm (0.98 in): Days with 25 mm or more rain	92	9	1963	2
50 mm (1.97 in): Days with 50 mm or more rain	38	3	1936	2
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1971	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

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Data for Norsk threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Norsk Threshold Days by Year (RSM00031388)

Key Facts for Norsk Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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