Willow City Threshold Days by Year

19 fixed thresholds counted per year at Willow City (USC00329445): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willow City Thresholds

Willow City: days with a maximum temperature at or below 0 C (32 F) in 120 years, most in 1935 with 134.
Willow City: days with a maximum temperature at or above 30 C (86 F) in 119 years, most in 1961 with 60.
Willow City: days with a maximum temperature at or above 90 F (32.2 C) in 118 years, most in 1936 with 43.
Willow City: nights with a minimum temperature at or below 0 C (32 F) in 110 years, most in 1907 with 235.
19 fixed thresholds have at least one qualifying day at Willow City.

Days at or above 30 C (86 F)

119 years with a qualifying day

Days per year at Willow City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1961.

Days at or above 30 C (86 F) per year at Willow City
Year	Days	Decade average
1898	31	31
1900	36	20.6
1901	27	20.6
1903	13	20.6
1904	10	20.6
1905	12	20.6
1907	26	20.6
1909	20	20.6
1910	35	22.5
1913	20	22.5
1914	30	22.5
1915	6	22.5
1916	20	22.5
1917	22	22.5
1918	9	22.5
1919	38	22.5
1920	27	21.9
1921	30	21.9
1922	21	21.9
1923	23	21.9
1925	24	21.9
1926	24	21.9
1927	10	21.9
1928	9	21.9
1929	29	21.9
1930	30	38.9
1931	41	38.9
1932	29	38.9
1933	42	38.9
1934	48	38.9
1935	20	38.9
1936	58	38.9
1937	35	38.9
1938	37	38.9
1939	49	38.9
1940	26	23.6
1941	36	23.6
1942	16	23.6
1943	21	23.6
1944	8	23.6
1945	18	23.6
1946	23	23.6
1947	32	23.6
1948	29	23.6
1949	27	23.6
1950	12	24.5
1951	14	24.5
1952	30	24.5
1953	27	24.5
1954	11	24.5
1955	30	24.5
1956	15	24.5
1957	31	24.5
1958	31	24.5
1959	44	24.5
1960	43	31.4
1961	60	31.4
1962	19	31.4
1963	38	31.4
1964	27	31.4
1965	18	31.4
1966	34	31.4
1967	32	31.4
1968	15	31.4
1969	28	31.4
1970	36	23.6
1971	15	23.6
1972	21	23.6
1973	20	23.6
1974	22	23.6
1975	20	23.6
1976	32	23.6
1977	20	23.6
1978	26	23.6
1979	24	23.6
1980	37	29.5
1981	20	29.5
1982	23	29.5
1983	41	29.5
1984	38	29.5
1985	13	29.5
1986	19	29.5
1987	27	29.5
1988	43	29.5
1989	34	29.5
1990	27	17.2
1991	23	17.2
1992	17	17.2
1993	5	17.2
1994	15	17.2
1995	25	17.2
1996	16	17.2
1997	19	17.2
1998	16	17.2
1999	9	17.2
2000	16	24.1
2001	30	24.1
2002	27	24.1
2003	37	24.1
2004	9	24.1
2005	23	24.1
2006	36	24.1
2007	30	24.1
2008	21	24.1
2009	12	24.1
2010	17	20.7
2011	21	20.7
2012	35	20.7
2013	19	20.7
2014	9	20.7
2015	23	20.7
2016	16	20.7
2017	22	20.7
2018	24	20.7
2020	19	27.4
2021	47	27.4
2022	23	27.4
2023	34	27.4
2024	14	27.4

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

First to last qualifying date each year at Willow City
Year	First date	Last date
1898	1898-05-07	1898-09-20
1900	1900-04-20	1900-09-07
1901	1901-04-30	1901-09-03
1903	1903-05-14	1903-08-20
1904	1904-06-16	1904-08-29
1905	1905-07-11	1905-09-28
1907	1907-06-01	1907-08-23
1909	1909-06-18	1909-10-06
1910	1910-04-26	1910-09-16
1913	1913-04-29	1913-09-05
1914	1914-06-02	1914-10-03
1915	1915-08-10	1915-09-02
1916	1916-07-03	1916-09-19
1917	1917-05-15	1917-09-23
1918	1918-05-04	1918-08-03
1919	1919-05-25	1919-08-22
1920	1920-06-13	1920-10-06
1921	1921-06-14	1921-09-01
1922	1922-06-04	1922-09-21
1923	1923-06-01	1923-09-21
1925	1925-05-21	1925-09-04
1926	1926-04-29	1926-08-27
1927	1927-07-25	1927-09-04
1928	1928-05-22	1928-09-06
1929	1929-05-13	1929-09-01
1930	1930-05-03	1930-09-10
1931	1931-05-14	1931-09-07
1932	1932-05-13	1932-09-09
1933	1933-05-31	1933-09-18
1934	1934-05-05	1934-10-13
1935	1935-06-28	1935-09-22
1936	1936-05-11	1936-09-22
1937	1937-05-28	1937-09-21
1938	1938-06-18	1938-10-03
1939	1939-05-05	1939-09-21
1940	1940-05-11	1940-09-05
1941	1941-05-17	1941-09-18
1942	1942-07-10	1942-09-10
1943	1943-05-22	1943-09-29
1944	1944-05-13	1944-07-30
1945	1945-06-21	1945-09-05
1946	1946-05-28	1946-09-16
1947	1947-04-28	1947-09-04
1948	1948-05-18	1948-09-18
1949	1949-04-29	1949-09-24
1950	1950-06-04	1950-09-06
1951	1951-05-23	1951-08-04
1952	1952-04-26	1952-09-27
1953	1953-06-11	1953-10-01
1954	1954-06-23	1954-08-31
1955	1955-05-13	1955-09-05
1956	1956-05-21	1956-09-26
1957	1957-07-01	1957-10-02
1958	1958-05-12	1958-09-13
1959	1959-05-24	1959-09-13
1960	1960-05-12	1960-09-21
1961	1961-05-30	1961-08-31
1962	1962-06-27	1962-09-02
1963	1963-05-30	1963-10-04
1964	1964-05-20	1964-09-17
1965	1965-05-13	1965-08-16
1966	1966-05-21	1966-09-12
1967	1967-06-04	1967-09-12
1968	1968-06-03	1968-09-15
1969	1969-05-27	1969-09-14
1970	1970-05-18	1970-09-06
1971	1971-07-03	1971-09-03
1972	1972-05-16	1972-09-10
1973	1973-05-18	1973-09-01
1974	1974-06-04	1974-08-25
1975	1975-06-25	1975-08-24
1976	1976-06-03	1976-10-01
1977	1977-04-10	1977-07-24
1978	1978-06-10	1978-09-11
1979	1979-05-17	1979-09-17
1980	1980-04-19	1980-09-08
1981	1981-06-28	1981-09-11
1982	1982-07-03	1982-09-11
1983	1983-06-11	1983-09-03
1984	1984-05-17	1984-09-19
1985	1985-04-29	1985-08-09
1986	1986-05-28	1986-08-31
1987	1987-04-29	1987-08-11
1988	1988-05-28	1988-08-17
1989	1989-06-07	1989-10-01
1990	1990-04-22	1990-09-12
1991	1991-05-13	1991-09-02
1992	1992-05-07	1992-10-02
1993	1993-05-14	1993-08-12
1994	1994-05-18	1994-09-10
1995	1995-06-14	1995-09-05
1996	1996-06-10	1996-09-01
1997	1997-06-01	1997-10-03
1998	1998-06-26	1998-09-11
1999	1999-05-29	1999-09-01
2000	2000-05-03	2000-08-25
2001	2001-04-29	2001-09-06
2002	2002-05-29	2002-09-18
2003	2003-05-29	2003-09-09
2004	2004-06-30	2004-09-19
2005	2005-06-18	2005-09-14
2006	2006-05-24	2006-09-14
2007	2007-05-10	2007-09-30
2008	2008-07-01	2008-08-31
2009	2009-06-21	2009-09-20
2010	2010-07-01	2010-08-28
2011	2011-06-30	2011-10-06
2012	2012-05-18	2012-09-30
2013	2013-05-14	2013-09-07
2014	2014-05-24	2014-09-27
2015	2015-07-05	2015-09-14
2016	2016-05-06	2016-09-02
2017	2017-06-02	2017-09-13
2018	2018-05-25	2018-08-31
2020	2020-06-08	2020-09-23
2021	2021-05-18	2021-10-07
2022	2022-06-19	2022-09-13
2023	2023-05-26	2023-09-19
2024	2024-07-11	2024-09-30

Every Fixed Threshold

Fixed thresholds at Willow City
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	119	60	1961	14
35 C (95 F): Days	94	25	1936	2
40 C (104 F): Days	9	6	1936	1
90 F (32.2 C): Days	118	43	1936	4
100 F (37.8 C): Days	39	13	1936	5
110 F (43.3 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	120	134	1935	55
0 C (32 F): Frost days (min	110	235	1907	113
-10 C (14 F): Days with min	110	142	2013	65
-20 C (-4 F): Days with min	110	92	1955	30
-30 C (-22 F): Days with min	109	46	1936	6
-40 C (-40 F): Days with min	47	8	1936	4
20 C (68 F): Tropical nights (min	48	8	1936	1
25 C (77 F): Days with min	1	1	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	98	20	1982	9
25 mm (0.98 in): Days with 25 mm or more rain	88	7	1905	1
50 mm (1.97 in): Days with 50 mm or more rain	32	2	1954	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1947	1
10 cm (3.9 in): Days with 10 cm or more snowfall	48	7	1996	5

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

Data for Willow City 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Willow City Threshold Days by Year

Key Facts for Willow City Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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