Willmar Wwtp Threshold Days by Year (USC00219004)

20 fixed thresholds counted per year at Willmar Wwtp (USC00219004): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willmar Wwtp Thresholds

Willmar Wwtp: nights with a minimum temperature at or below 0 C (32 F) in 101 years, most in 1926 with 187.
Willmar Wwtp: nights with a minimum temperature at or below -10 C (14 F) in 101 years, most in 1950 with 111.
Willmar Wwtp: nights with a minimum temperature at or below -20 C (-4 F) in 101 years, most in 1985 with 56.
Willmar Wwtp: days with 10 mm (0.39 in) or more of precipitation in 101 years, most in 1965 with 37.
20 fixed thresholds have at least one qualifying day at Willmar Wwtp.

Days at or above 30 C (86 F)

100 years with a qualifying day

Days per year at Willmar Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 64 in 1976.

Days at or above 30 C (86 F) per year at Willmar Wwtp
Year	Days	Decade average
1894	48	28.2
1895	21	28.2
1896	27	28.2
1897	27	28.2
1898	23	28.2
1899	23	28.2
1900	35	36.5
1901	38	36.5
1917	24	23
1918	22	23
1919	23	23
1920	6	19.3
1921	22	19.3
1922	17	19.3
1923	14	19.3
1924	3	19.3
1925	35	19.3
1926	26	19.3
1927	13	19.3
1928	20	19.3
1929	37	19.3
1930	31	46
1931	52	46
1932	37	46
1933	54	46
1934	53	46
1935	43	46
1936	58	46
1937	51	46
1938	36	46
1939	45	46
1940	33	32.3
1941	35	32.3
1942	15	32.3
1943	36	32.3
1944	18	32.3
1945	25	32.3
1946	24	32.3
1947	48	32.3
1948	43	32.3
1949	46	32.3
1950	20	27.2
1951	11	27.2
1952	34	27.2
1953	29	27.2
1954	21	27.2
1955	35	27.2
1956	19	27.2
1957	21	27.2
1958	31	27.2
1959	51	27.2
1960	27	24.9
1961	37	24.9
1962	13	24.9
1963	23	24.9
1964	40	24.9
1965	13	24.9
1966	31	24.9
1967	15	24.9
1968	23	24.9
1969	27	24.9
1970	42	35.6
1971	21	35.6
1972	22	35.6
1973	25	35.6
1974	40	35.6
1975	43	35.6
1976	64	35.6
1977	29	35.6
1978	34	35.6
1980	38	29.7
1981	15	29.7
1982	20	29.7
1983	38	29.7
1984	22	29.7
1985	20	29.7
1986	17	29.7
1987	41	29.7
1988	59	29.7
1989	27	29.7
1990	21	17.9
1991	19	17.9
1992	13	17.9
1993	8	17.9
1994	14	17.9
1995	22	17.9
1996	14	17.9
1997	21	17.9
1998	21	17.9
1999	26	17.9
2000	24	26.8
2001	38	26.8
2002	30	26.8
2003	28	26.8
2004	10	26.8
2005	30	26.8
2006	30	26.8
2007	45	26.8
2008	17	26.8
2009	16	26.8

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

First to last qualifying date each year at Willmar Wwtp
Year	First date	Last date
1894	1894-05-14	1894-09-28
1895	1895-05-08	1895-09-19
1896	1896-05-06	1896-08-30
1897	1897-06-12	1897-09-29
1898	1898-06-02	1898-09-21
1899	1899-05-26	1899-09-06
1900	1900-05-12	1900-09-05
1901	1901-04-30	1901-09-05
1917	1917-05-16	1917-08-26
1918	1918-05-05	1918-08-25
1919	1919-05-28	1919-09-19
1920	1920-06-11	1920-08-09
1921	1921-06-25	1921-08-30
1922	1922-06-05	1922-10-03
1923	1923-06-20	1923-07-23
1924	1924-08-25	1924-08-28
1925	1925-05-21	1925-09-19
1926	1926-05-01	1926-09-08
1927	1927-06-24	1927-09-14
1928	1928-05-09	1928-10-10
1929	1929-06-10	1929-09-23
1930	1930-05-21	1930-08-31
1931	1931-05-15	1931-09-20
1932	1932-05-13	1932-10-01
1933	1933-06-01	1933-09-08
1934	1934-04-28	1934-08-19
1935	1935-06-13	1935-09-24
1936	1936-05-16	1936-09-23
1937	1937-05-29	1937-09-23
1938	1938-06-14	1938-10-09
1939	1939-05-05	1939-09-15
1940	1940-05-12	1940-09-19
1941	1941-05-18	1941-09-20
1942	1942-06-05	1942-09-05
1943	1943-05-28	1943-09-28
1944	1944-05-30	1944-09-17
1945	1945-06-22	1945-10-17
1946	1946-06-10	1946-09-04
1947	1947-06-26	1947-10-21
1948	1948-05-19	1948-09-18
1949	1949-05-03	1949-08-27
1950	1950-05-23	1950-08-31
1951	1951-07-14	1951-08-28
1952	1952-04-30	1952-09-27
1953	1953-05-29	1953-10-02
1954	1954-06-11	1954-08-28
1955	1955-05-02	1955-09-18
1956	1956-06-05	1956-09-27
1957	1957-07-02	1957-09-01
1958	1958-05-10	1958-09-03
1959	1959-05-01	1959-09-09
1960	1960-06-26	1960-09-07
1961	1961-05-11	1961-10-06
1962	1962-04-24	1962-08-27
1963	1963-05-07	1963-10-05
1964	1964-05-18	1964-09-03
1965	1965-06-19	1965-08-14
1966	1966-05-26	1966-08-31
1967	1967-06-30	1967-08-24
1968	1968-06-03	1968-08-24
1969	1969-05-27	1969-09-14
1970	1970-05-07	1970-10-05
1971	1971-05-14	1971-09-08
1972	1972-05-17	1972-09-19
1973	1973-06-01	1973-08-29
1974	1974-05-20	1974-09-27
1975	1975-05-17	1975-09-10
1976	1976-06-05	1976-09-30
1977	1977-04-09	1977-09-08
1978	1978-05-25	1978-09-12
1980	1980-04-20	1980-09-09
1981	1981-06-07	1981-09-11
1982	1982-06-29	1982-08-20
1983	1983-06-11	1983-09-28
1984	1984-06-01	1984-09-20
1985	1985-04-18	1985-09-19
1986	1986-05-30	1986-08-17
1987	1987-04-19	1987-09-28
1988	1988-05-13	1988-09-19
1989	1989-06-20	1989-08-14
1990	1990-05-08	1990-09-14
1991	1991-05-13	1991-08-31
1992	1992-05-01	1992-10-03
1993	1993-06-12	1993-10-07
1994	1994-05-20	1994-09-15
1995	1995-06-15	1995-08-22
1996	1996-06-11	1996-09-06
1997	1997-06-02	1997-10-03
1998	1998-05-15	1998-09-20
1999	1999-05-29	1999-09-04
2000	2000-05-05	2000-09-19
2001	2001-05-15	2001-10-03
2002	2002-05-30	2002-09-17
2003	2003-04-15	2003-10-08
2004	2004-04-19	2004-09-21
2005	2005-06-19	2005-09-22
2006	2006-05-24	2006-10-02
2007	2007-05-14	2007-10-07
2008	2008-06-25	2008-09-27
2009	2009-04-24	2009-09-19

Every Fixed Threshold

Fixed thresholds at Willmar Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	100	64	1976	16
35 C (95 F): Days	81	23	1988	1
40 C (104 F): Days	5	6	1936	1
90 F (32.2 C): Days	100	41	1936	5
100 F (37.8 C): Days	14	12	1931	1
0 C (32 F): Ice days (max	100	113	1950	90
0 C (32 F): Frost days (min	101	187	1926	166
-10 C (14 F): Days with min	101	111	1950	80
-20 C (-4 F): Days with min	101	56	1985	38
-30 C (-22 F): Days with min	74	22	1936	4
-40 C (-40 F): Days with min	1	1	1977	1
20 C (68 F): Tropical nights (min	99	24	1955	3
25 C (77 F): Days with min	8	2	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	101	37	1965	22
25 mm (0.98 in): Days with 25 mm or more rain	101	12	1968	5
50 mm (1.97 in): Days with 50 mm or more rain	69	4	1942	4
100 mm (3.94 in): Days with 100 mm or more rain	10	1	1895	1
10 cm (3.9 in): Days with 10 cm or more snowfall	74	12	1982	5
25 cm (9.8 in): Days with 25 cm or more snowfall	15	2	1975	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2001	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

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Data for Willmar Wwtp 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).

Willmar Wwtp Threshold Days by Year (USC00219004)

Key Facts for Willmar Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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