Thule Threshold Days by Year

4 fixed thresholds counted per year at Thule (ASN00099007): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thule Thresholds

Thule: days with 10 mm (0.39 in) or more of precipitation in 72 years, most in 1956 with 40.
Thule: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1935 with 10.
Thule: days with 50 mm (1.97 in) or more of precipitation in 35 years, most in 1946 with 5.
Thule: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1937 with 1.
4 fixed thresholds have at least one qualifying day at Thule.

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

72 years with a qualifying day

Days per year at Thule with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1956.

Days with 10 mm (0.39 in) or more of precipitation per year at Thule
Year	Days	Decade average
1900	25	17.5
1904	16	17.5
1908	7	17.5
1909	22	17.5
1910	22	22.3
1911	26	22.3
1912	21	22.3
1913	18	22.3
1914	17	22.3
1915	15	22.3
1916	29	22.3
1917	37	22.3
1918	22	22.3
1919	16	22.3
1920	23	21.6
1921	23	21.6
1922	24	21.6
1923	26	21.6
1924	23	21.6
1925	18	21.6
1926	20	21.6
1927	12	21.6
1928	25	21.6
1929	22	21.6
1930	21	23.5
1931	25	23.5
1932	23	23.5
1933	17	23.5
1934	25	23.5
1935	27	23.5
1936	26	23.5
1937	17	23.5
1938	19	23.5
1939	35	23.5
1940	19	21.5
1941	18	21.5
1942	22	21.5
1943	12	21.5
1944	15	21.5
1945	20	21.5
1946	27	21.5
1947	34	21.5
1948	16	21.5
1949	32	21.5
1950	22	25.4
1951	24	25.4
1952	34	25.4
1953	23	25.4
1954	21	25.4
1955	30	25.4
1956	40	25.4
1957	14	25.4
1959	21	25.4
1960	22	22.5
1961	23	22.5
1962	24	22.5
1963	27	22.5
1964	25	22.5
1965	15	22.5
1966	23	22.5
1967	17	22.5
1968	20	22.5
1969	29	22.5
1970	28	25
1971	36	25
1972	21	25
1973	23	25
1974	27	25
1975	22	25
1976	24	25
1977	18	25
1978	26	25

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

First to last qualifying date each year at Thule
Year	First date	Last date
1900	1900-01-07	1900-12-12
1904	1904-01-03	1904-12-26
1908	1908-01-24	1908-11-27
1909	1909-02-25	1909-10-17
1910	1910-01-15	1910-12-23
1911	1911-02-14	1911-12-26
1912	1912-03-28	1912-12-04
1913	1913-03-06	1913-12-24
1914	1914-01-27	1914-12-30
1915	1915-02-21	1915-10-24
1916	1916-01-18	1916-12-09
1917	1917-01-22	1917-12-31
1918	1918-01-12	1918-09-04
1919	1919-01-07	1919-12-28
1920	1920-01-03	1920-12-14
1921	1921-01-02	1921-12-30
1922	1922-01-30	1922-12-31
1923	1923-01-19	1923-12-10
1924	1924-01-11	1924-11-12
1925	1925-02-01	1925-11-18
1926	1926-01-05	1926-11-18
1927	1927-01-06	1927-12-04
1928	1928-01-24	1928-12-23
1929	1929-01-30	1929-12-28
1930	1930-02-22	1930-12-25
1931	1931-01-26	1931-11-16
1932	1932-02-09	1932-12-07
1933	1933-01-24	1933-12-15
1934	1934-01-07	1934-12-16
1935	1935-01-05	1935-12-27
1936	1936-02-21	1936-12-16
1937	1937-01-25	1937-12-26
1938	1938-02-03	1938-12-10
1939	1939-02-24	1939-12-06
1940	1940-01-19	1940-12-28
1941	1941-01-25	1941-12-06
1942	1942-01-20	1942-12-19
1943	1943-02-18	1943-11-18
1944	1944-01-23	1944-12-19
1945	1945-01-31	1945-11-10
1946	1946-01-18	1946-11-09
1947	1947-03-01	1947-12-24
1948	1948-01-13	1948-11-10
1949	1949-01-01	1949-12-28
1950	1950-01-17	1950-12-21
1951	1951-02-18	1951-12-15
1952	1952-01-14	1952-12-27
1953	1953-01-03	1953-11-27
1954	1954-01-29	1954-12-04
1955	1955-02-12	1955-12-28
1956	1956-02-14	1956-12-29
1957	1957-03-10	1957-12-25
1959	1959-01-26	1959-12-28
1960	1960-02-14	1960-12-03
1961	1961-02-09	1961-12-16
1962	1962-01-20	1962-12-04
1963	1963-01-01	1963-11-08
1964	1964-02-11	1964-12-24
1965	1965-01-12	1965-12-02
1966	1966-02-24	1966-12-19
1967	1967-01-13	1967-12-31
1968	1968-03-09	1968-12-24
1969	1969-01-15	1969-12-30
1970	1970-01-02	1970-12-29
1971	1971-01-24	1971-12-31
1972	1972-01-01	1972-11-11
1973	1973-01-13	1973-12-23
1974	1974-01-05	1974-12-26
1975	1975-01-10	1975-12-17
1976	1976-03-01	1976-12-16
1977	1977-02-24	1977-11-29
1978	1978-01-19	1978-12-13

Every Fixed Threshold

Fixed thresholds at Thule
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	72	40	1956	26
25 mm (0.98 in): Days with 25 mm or more rain	70	10	1935	2
50 mm (1.97 in): Days with 50 mm or more rain	35	5	1946	1
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1937	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Thule 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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

Thule Threshold Days by Year

Key Facts for Thule Thresholds

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

Every Fixed Threshold

Download the Data

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