Eureka Threshold Days by Year (SF002578450)

4 fixed thresholds counted per year at Eureka (SF002578450): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Eureka Thresholds

Eureka: days with 10 mm (0.39 in) or more of precipitation in 82 years, most in 1974 with 35.
Eureka: days with 25 mm (0.98 in) or more of precipitation in 77 years, most in 1974 with 11.
Eureka: days with 50 mm (1.97 in) or more of precipitation in 28 years, most in 1974 with 3.
Eureka: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1941 with 1.
4 fixed thresholds have at least one qualifying day at Eureka.

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

82 years with a qualifying day

Days per year at Eureka with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Eureka
Year	Days	Decade average
1915	5	8.5
1916	5	8.5
1918	19	8.5
1919	5	8.5
1920	9	10.6
1921	12	10.6
1922	5	10.6
1923	8	10.6
1924	17	10.6
1925	14	10.6
1926	6	10.6
1927	11	10.6
1928	9	10.6
1929	15	10.6
1930	6	12
1931	13	12
1932	7	12
1933	5	12
1934	18	12
1935	18	12
1936	21	12
1937	12	12
1938	10	12
1939	10	12
1940	4	10.2
1941	17	10.2
1942	9	10.2
1943	19	10.2
1944	11	10.2
1945	5	10.2
1946	8	10.2
1947	10	10.2
1948	15	10.2
1949	4	10.2
1950	18	12.6
1951	8	12.6
1952	10	12.6
1953	8	12.6
1954	10	12.6
1955	13	12.6
1956	12	12.6
1957	16	12.6
1958	14	12.6
1959	17	12.6
1960	8	11.6
1961	15	11.6
1962	13	11.6
1963	16	11.6
1964	7	11.6
1965	6	11.6
1966	11	11.6
1967	18	11.6
1968	11	11.6
1969	11	11.6
1970	14	16.9
1971	10	16.9
1972	9	16.9
1973	13	16.9
1974	35	16.9
1975	20	16.9
1976	28	16.9
1977	17	16.9
1978	8	16.9
1979	15	16.9
1980	13	12.4
1981	22	12.4
1982	9	12.4
1983	7	12.4
1984	7	12.4
1985	10	12.4
1986	10	12.4
1987	11	12.4
1988	24	12.4
1989	11	12.4
1990	9	11.6
1991	18	11.6
1992	6	11.6
1993	15	11.6
1994	11	11.6
1995	13	11.6
1996	10	11.6
1997	11	11.6

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

First to last qualifying date each year at Eureka
Year	First date	Last date
1915	1915-02-14	1915-11-11
1916	1916-03-02	1916-12-13
1918	1918-01-01	1918-12-27
1919	1919-03-01	1919-09-11
1920	1920-01-29	1920-12-15
1921	1921-02-03	1921-12-25
1922	1922-01-25	1922-12-30
1923	1923-01-27	1923-11-13
1924	1924-01-26	1924-12-08
1925	1925-01-01	1925-12-07
1926	1926-03-08	1926-12-19
1927	1927-01-26	1927-12-26
1928	1928-01-04	1928-11-23
1929	1929-01-18	1929-12-13
1930	1930-01-16	1930-12-23
1931	1931-01-12	1931-11-06
1932	1932-01-14	1932-12-25
1933	1933-03-01	1933-12-13
1934	1934-01-02	1934-12-25
1935	1935-02-02	1935-12-31
1936	1936-01-28	1936-12-27
1937	1937-01-19	1937-12-14
1938	1938-01-28	1938-12-17
1939	1939-01-31	1939-11-04
1940	1940-03-20	1940-12-02
1941	1941-01-01	1941-10-25
1942	1942-03-01	1942-12-26
1943	1943-01-13	1943-12-31
1944	1944-02-09	1944-12-29
1945	1945-01-06	1945-11-09
1946	1946-03-18	1946-11-25
1947	1947-01-14	1947-12-11
1948	1948-02-04	1948-11-30
1949	1949-03-03	1949-11-15
1950	1950-02-15	1950-12-29
1951	1951-01-01	1951-10-02
1952	1952-01-29	1952-12-16
1953	1953-02-07	1953-12-19
1954	1954-01-15	1954-12-08
1955	1955-01-26	1955-12-19
1956	1956-02-07	1956-12-16
1957	1957-03-04	1957-12-30
1958	1958-01-07	1958-12-26
1959	1959-01-06	1959-12-03
1960	1960-01-23	1960-12-29
1961	1961-01-02	1961-12-15
1962	1962-01-17	1962-11-18
1963	1963-01-05	1963-11-18
1964	1964-02-11	1964-12-25
1965	1965-01-16	1965-11-09
1966	1966-01-19	1966-12-18
1967	1967-01-01	1967-11-16
1968	1968-01-08	1968-12-01
1969	1969-02-15	1969-11-07
1970	1970-02-04	1970-12-24
1971	1971-01-08	1971-12-18
1972	1972-01-07	1972-04-12
1973	1973-01-04	1973-12-22
1974	1974-01-05	1974-12-01
1975	1975-01-14	1975-12-27
1976	1976-01-09	1976-12-15
1977	1977-01-12	1977-12-24
1978	1978-01-09	1978-12-09
1979	1979-01-17	1979-12-15
1980	1980-02-07	1980-12-01
1981	1981-01-11	1981-12-22
1982	1982-02-21	1982-12-05
1983	1983-06-17	1983-11-28
1984	1984-02-26	1984-11-28
1985	1985-02-20	1985-12-19
1986	1986-01-19	1986-11-05
1987	1987-02-12	1987-12-22
1988	1988-02-13	1988-12-31
1989	1989-01-05	1989-11-12
1990	1990-02-02	1990-12-23
1991	1991-01-06	1991-12-10
1992	1992-03-24	1992-11-08
1993	1993-02-11	1993-12-27
1994	1994-01-07	1994-03-04
1995	1995-01-11	1995-12-19
1996	1996-01-25	1996-12-29
1997	1997-02-09	1997-10-15

Every Fixed Threshold

Fixed thresholds at Eureka
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	82	35	1974	11
25 mm (0.98 in): Days with 25 mm or more rain	77	11	1974	2
50 mm (1.97 in): Days with 50 mm or more rain	28	3	1974	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1941	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Eureka 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).

Eureka Threshold Days by Year (SF002578450)

Key Facts for Eureka Thresholds

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

Every Fixed Threshold

Download the Data

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