Flakatrask Threshold Days by Year (SWE00140284)

3 fixed thresholds counted per year at Flakatrask (SWE00140284): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Flakatrask Thresholds

Flakatrask: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1974 with 26.
Flakatrask: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1950 with 4.
Flakatrask: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1945 with 1.
3 fixed thresholds have at least one qualifying day at Flakatrask.

Days with 10 mm (0.39 in) or more of precipitation

42 years with a qualifying day

Days per year at Flakatrask with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Flakatrask
Year	Days	Decade average
1945	19	14.2
1946	13	14.2
1947	16	14.2
1948	11	14.2
1949	12	14.2
1950	19	15.6
1952	17	15.6
1953	20	15.6
1954	22	15.6
1955	9	15.6
1956	16	15.6
1957	15	15.6
1958	13	15.6
1959	9	15.6
1960	25	14.6
1961	18	14.6
1962	16	14.6
1963	15	14.6
1964	8	14.6
1965	8	14.6
1966	11	14.6
1967	22	14.6
1968	16	14.6
1969	7	14.6
1970	18	14.6
1971	10	14.6
1972	7	14.6
1973	14	14.6
1974	26	14.6
1975	13	14.6
1976	9	14.6
1977	15	14.6
1978	15	14.6
1979	19	14.6
1980	11	16
1981	19	16
1982	8	16
1983	17	16
1984	15	16
1985	17	16
1986	16	16
1987	25	16

For each year, a bar from the first to the last day at Flakatrask meeting 10 mm (0.39 in).

First to last qualifying date each year at Flakatrask
Year	First date	Last date
1945	1945-01-04	1945-11-07
1946	1946-03-05	1946-12-07
1947	1947-03-25	1947-12-25
1948	1948-01-29	1948-12-16
1949	1949-01-19	1949-12-26
1950	1950-04-03	1950-12-19
1952	1952-02-09	1952-11-24
1953	1953-02-03	1953-11-07
1954	1954-01-19	1954-12-12
1955	1955-05-14	1955-12-28
1956	1956-04-09	1956-11-25
1957	1957-03-13	1957-12-29
1958	1958-01-28	1958-12-17
1959	1959-01-09	1959-10-27
1960	1960-02-08	1960-12-19
1961	1961-02-06	1961-11-30
1962	1962-01-31	1962-11-15
1963	1963-05-03	1963-12-18
1964	1964-06-06	1964-10-12
1965	1965-01-22	1965-09-08
1966	1966-04-03	1966-12-18
1967	1967-01-01	1967-12-28
1968	1968-01-25	1968-12-28
1969	1969-05-09	1969-11-10
1970	1970-03-06	1970-10-19
1971	1971-06-02	1971-11-08
1972	1972-04-30	1972-11-10
1973	1973-04-05	1973-11-19
1974	1974-02-08	1974-12-17
1975	1975-01-13	1975-12-02
1976	1976-01-08	1976-12-05
1977	1977-01-26	1977-11-12
1978	1978-01-30	1978-11-15
1979	1979-03-26	1979-11-29
1980	1980-05-08	1980-11-20
1981	1981-01-15	1981-12-06
1982	1982-04-23	1982-10-22
1983	1983-01-27	1983-12-30
1984	1984-01-13	1984-12-06
1985	1985-05-29	1985-11-09
1986	1986-03-22	1986-11-10
1987	1987-01-25	1987-11-20

Every Fixed Threshold

Fixed thresholds at Flakatrask
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	42	26	1974	25
25 mm (0.98 in): Days with 25 mm or more rain	31	4	1950	3
50 mm (1.97 in): Days with 50 mm or more rain	6	1	1945	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

Data for Flakatrask 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).

Flakatrask Threshold Days by Year (SWE00140284)

Key Facts for Flakatrask Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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