River Falls Threshold Days by Year (USC00477226)

19 fixed thresholds counted per year at River Falls (USC00477226): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for River Falls Thresholds

River Falls: days with a maximum temperature at or above 30 C (86 F) in 107 years, most in 1988 with 62.
River Falls: days with a maximum temperature at or below 0 C (32 F) in 107 years, most in 1950 with 108.
River Falls: nights with a minimum temperature at or below 0 C (32 F) in 107 years, most in 1997 with 188.
River Falls: nights with a minimum temperature at or below -10 C (14 F) in 107 years, most in 1926 with 100.
19 fixed thresholds have at least one qualifying day at River Falls.

Days at or above 30 C (86 F)

107 years with a qualifying day

Days per year at River Falls with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 62 in 1988.

Days at or above 30 C (86 F) per year at River Falls
Year	Days	Decade average
1920	25	24.4
1921	31	24.4
1922	27	24.4
1923	41	24.4
1924	12	24.4
1925	31	24.4
1926	17	24.4
1927	16	24.4
1928	15	24.4
1929	29	24.4
1930	41	42.4
1931	48	42.4
1932	34	42.4
1933	51	42.4
1934	53	42.4
1935	38	42.4
1936	50	42.4
1937	43	42.4
1938	24	42.4
1939	42	42.4
1940	25	25.2
1941	32	25.2
1942	12	25.2
1943	27	25.2
1944	19	25.2
1945	15	25.2
1946	23	25.2
1947	38	25.2
1948	28	25.2
1949	33	25.2
1950	7	20.8
1951	6	20.8
1952	23	20.8
1953	21	20.8
1954	15	20.8
1955	43	20.8
1956	18	20.8
1957	22	20.8
1958	17	20.8
1959	36	20.8
1960	31	27.9
1961	35	27.9
1962	16	27.9
1963	40	27.9
1964	44	27.9
1965	12	27.9
1966	37	27.9
1967	11	27.9
1968	26	27.9
1969	27	27.9
1970	37	27.5
1971	17	27.5
1972	18	27.5
1973	25	27.5
1974	26	27.5
1975	37	27.5
1976	47	27.5
1977	25	27.5
1978	29	27.5
1979	14	27.5
1980	31	28.3
1981	12	28.3
1982	25	28.3
1983	37	28.3
1984	16	28.3
1985	23	28.3
1986	18	28.3
1987	36	28.3
1988	62	28.3
1989	23	28.3
1990	17	19
1991	26	19
1992	12	19
1993	11	19
1994	13	19
1995	30	19
1996	18	19
1997	14	19
1998	23	19
1999	26	19
2000	20	23.7
2001	30	23.7
2002	29	23.7
2003	29	23.7
2004	9	23.7
2005	28	23.7
2006	34	23.7
2007	40	23.7
2008	10	23.7
2009	8	23.7
2010	22	18.3
2011	22	18.3
2012	38	18.3
2013	21	18.3
2014	4	18.3
2015	8	18.3
2016	18	18.3
2017	16	18.3
2018	25	18.3
2019	9	18.3
2020	21	26.7
2021	29	26.7
2022	20	26.7
2023	35	26.7
2024	16	26.7
2025	28	26.7
2026	38	26.7

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

First to last qualifying date each year at River Falls
Year	First date	Last date
1920	1920-06-09	1920-09-26
1921	1921-05-22	1921-09-02
1922	1922-05-12	1922-10-05
1923	1923-06-02	1923-09-27
1924	1924-07-09	1924-09-01
1925	1925-05-23	1925-09-20
1926	1926-05-31	1926-08-30
1927	1927-06-25	1927-09-15
1928	1928-05-10	1928-10-11
1929	1929-05-29	1929-09-04
1930	1930-06-03	1930-09-23
1931	1931-05-16	1931-09-21
1932	1932-05-15	1932-08-31
1933	1933-06-03	1933-09-09
1934	1934-04-29	1934-08-22
1935	1935-07-02	1935-09-25
1936	1936-05-17	1936-09-23
1937	1937-05-30	1937-09-23
1938	1938-06-21	1938-10-16
1939	1939-05-05	1939-09-15
1940	1940-06-01	1940-09-19
1941	1941-05-19	1941-09-20
1942	1942-06-05	1942-09-11
1943	1943-05-05	1943-08-31
1944	1944-05-29	1944-09-17
1945	1945-06-23	1945-09-07
1946	1946-06-05	1946-08-17
1947	1947-06-26	1947-10-21
1948	1948-06-02	1948-09-18
1949	1949-05-03	1949-08-27
1950	1950-06-06	1950-08-16
1951	1951-05-01	1951-07-26
1952	1952-04-28	1952-09-13
1953	1953-05-30	1953-10-02
1954	1954-06-09	1954-09-01
1955	1955-05-02	1955-09-18
1956	1956-06-08	1956-08-28
1957	1957-04-30	1957-09-01
1958	1958-05-10	1958-08-19
1959	1959-05-01	1959-09-08
1960	1960-07-16	1960-09-07
1961	1961-06-05	1961-09-10
1962	1962-04-26	1962-08-27
1963	1963-05-07	1963-10-14
1964	1964-04-16	1964-09-03
1965	1965-06-27	1965-08-17
1966	1966-05-26	1966-09-01
1967	1967-05-26	1967-08-16
1968	1968-04-30	1968-08-24
1969	1969-05-27	1969-08-30
1970	1970-04-29	1970-08-28
1971	1971-06-12	1971-09-07
1972	1972-05-17	1972-08-29
1973	1973-06-09	1973-08-29
1974	1974-06-29	1974-08-21
1975	1975-05-19	1975-08-24
1976	1976-06-06	1976-09-12
1977	1977-04-11	1977-08-27
1978	1978-05-25	1978-09-11
1979	1979-05-17	1979-09-01
1980	1980-04-21	1980-09-09
1981	1981-06-07	1981-08-13
1982	1982-06-28	1982-08-20
1983	1983-06-22	1983-09-08
1984	1984-06-26	1984-09-20
1985	1985-04-19	1985-09-19
1986	1986-05-31	1986-08-17
1987	1987-04-18	1987-09-06
1988	1988-05-28	1988-09-11
1989	1989-06-19	1989-08-11
1990	1990-05-07	1990-09-13
1991	1991-04-06	1991-08-31
1992	1992-05-01	1992-08-24
1993	1993-06-14	1993-09-01
1994	1994-05-21	1994-08-05
1995	1995-06-15	1995-09-07
1996	1996-06-13	1996-09-11
1997	1997-06-24	1997-10-04
1998	1998-05-15	1998-09-20
1999	1999-06-06	1999-09-04
2000	2000-05-05	2000-09-19
2001	2001-05-15	2001-09-06
2002	2002-04-16	2002-09-10
2003	2003-04-15	2003-09-12
2004	2004-04-29	2004-09-03
2005	2005-06-08	2005-09-22
2006	2006-05-28	2006-08-05
2007	2007-05-11	2007-10-07
2008	2008-06-25	2008-08-18
2009	2009-05-20	2009-08-16
2010	2010-05-24	2010-08-31
2011	2011-05-31	2011-09-13
2012	2012-05-19	2012-09-12
2013	2013-05-15	2013-09-10
2014	2014-05-31	2014-07-22
2015	2015-06-10	2015-08-16
2016	2016-05-07	2016-08-24
2017	2017-06-03	2017-09-25
2018	2018-05-25	2018-09-17
2019	2019-06-01	2019-08-05
2020	2020-06-02	2020-08-27
2021	2021-05-02	2021-09-20
2022	2022-05-13	2022-09-02
2023	2023-04-13	2023-10-03
2024	2024-05-13	2024-09-20
2025	2025-05-12	2025-10-05
2026	2026-05-16	2026-09-05

Every Fixed Threshold

Fixed thresholds at River Falls
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	107	62	1988	38
35 C (95 F): Days	62	20	1931	2
40 C (104 F): Days	3	5	1936	5
90 F (32.2 C): Days	104	42	1988	15
100 F (37.8 C): Days	15	14	1936	1
0 C (32 F): Ice days (max	107	108	1950	45
0 C (32 F): Frost days (min	107	188	1997	103
-10 C (14 F): Days with min	107	100	1926	46
-20 C (-4 F): Days with min	107	55	1929	17
-30 C (-22 F): Days with min	75	27	1936	3
-40 C (-40 F): Days with min	4	2	1936	1
20 C (68 F): Tropical nights (min	105	27	1937	15
25 C (77 F): Days with min	23	5	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	103	37	1938	16
25 mm (0.98 in): Days with 25 mm or more rain	103	13	2001	2
50 mm (1.97 in): Days with 50 mm or more rain	74	5	1978	2
100 mm (3.94 in): Days with 100 mm or more rain	10	1	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	86	9	1983	2
25 cm (9.8 in): Days with 25 cm or more snowfall	12	2	1982	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

Data for River Falls 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

River Falls Threshold Days by Year (USC00477226)

Key Facts for River Falls Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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