Winterset 4N Threshold Days by Year (USC00139132)

19 fixed thresholds counted per year at Winterset 4N (USC00139132): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Winterset 4N Thresholds

Winterset 4N: nights with a minimum temperature at or below 0 C (32 F) in 115 years, most in 1976 with 177.
Winterset 4N: nights with a minimum temperature at or below -10 C (14 F) in 115 years, most in 1978 with 75.
Winterset 4N: nights with a minimum temperature at or above 20 C (68 F) in 115 years, most in 1934 with 54.
Winterset 4N: days with a maximum temperature at or above 30 C (86 F) in 114 years, most in 1934 with 98.
19 fixed thresholds have at least one qualifying day at Winterset 4N.

Days at or above 30 C (86 F)

114 years with a qualifying day

Days per year at Winterset 4N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 98 in 1934.

Days at or above 30 C (86 F) per year at Winterset 4N
Year	Days	Decade average
1894	88	61.7
1895	71	61.7
1896	47	61.7
1897	55	61.7
1898	58	61.7
1899	51	61.7
1900	74	49
1902	22	49
1905	33	49
1906	51	49
1907	45	49
1908	53	49
1909	65	49
1910	65	62.3
1911	92	62.3
1912	57	62.3
1913	78	62.3
1914	78	62.3
1915	24	62.3
1916	66	62.3
1917	39	62.3
1918	60	62.3
1919	64	62.3
1920	44	53.3
1921	77	53.3
1922	57	53.3
1923	47	53.3
1924	34	53.3
1925	68	53.3
1926	52	53.3
1927	61	53.3
1928	47	53.3
1929	46	53.3
1930	66	77.8
1931	80	77.8
1932	63	77.8
1933	86	77.8
1934	98	77.8
1935	60	77.8
1936	95	77.8
1937	69	77.8
1938	75	77.8
1939	86	77.8
1940	54	49.5
1941	50	49.5
1942	47	49.5
1943	55	49.5
1944	51	49.5
1945	29	49.5
1948	54	49.5
1949	56	49.5
1950	34	53
1951	33	53
1952	64	53
1954	69	53
1955	70	53
1956	72	53
1957	52	53
1958	34	53
1959	49	53
1960	41	41.4
1961	41	41.4
1962	48	41.4
1963	56	41.4
1964	43	41.4
1965	31	41.4
1966	35	41.4
1967	38	41.4
1968	43	41.4
1969	38	41.4
1970	52	48.1
1971	48	48.1
1972	40	48.1
1973	40	48.1
1974	38	48.1
1975	53	48.1
1976	44	48.1
1977	56	48.1
1978	58	48.1
1979	52	48.1
1980	63	50.2
1981	39	50.2
1986	39	50.2
1987	51	50.2
1988	74	50.2
1989	35	50.2
1990	43	32.8
1991	47	32.8
1992	14	32.8
1993	19	32.8
1994	34	32.8
1995	40	32.8
1996	16	32.8
1997	44	32.8
1998	36	32.8
1999	35	32.8
2000	40	35.2
2001	46	35.2
2002	48	35.2
2003	37	35.2
2004	10	35.2
2005	55	35.2
2006	48	35.2
2007	44	35.2
2008	11	35.2
2009	13	35.2
2010	27	43.5
2011	38	43.5
2012	68	43.5
2013	41	43.5
2023	56	55.3
2024	45	55.3
2025	55	55.3
2026	65	55.3

For each year, a bar from the first to the last day at Winterset 4N meeting 30 C (86 F).

First to last qualifying date each year at Winterset 4N
Year	First date	Last date
1894	1894-04-28	1894-09-28
1895	1895-03-29	1895-09-21
1896	1896-04-15	1896-09-09
1897	1897-05-07	1897-10-04
1898	1898-04-16	1898-10-02
1899	1899-05-26	1899-10-22
1900	1900-05-11	1900-10-18
1902	1902-04-21	1902-08-02
1905	1905-06-03	1905-09-01
1906	1906-04-24	1906-09-16
1907	1907-03-25	1907-09-21
1908	1908-05-19	1908-09-21
1909	1909-05-05	1909-09-12
1910	1910-04-28	1910-09-30
1911	1911-05-09	1911-09-18
1912	1912-05-19	1912-09-10
1913	1913-05-28	1913-09-07
1914	1914-05-10	1914-09-19
1915	1915-04-28	1915-09-13
1916	1916-04-12	1916-10-04
1917	1917-05-17	1917-09-07
1918	1918-05-03	1918-10-15
1919	1919-05-30	1919-09-20
1920	1920-05-22	1920-10-10
1921	1921-05-20	1921-10-16
1922	1922-06-06	1922-10-05
1923	1923-06-01	1923-09-05
1924	1924-05-05	1924-08-30
1925	1925-04-22	1925-09-20
1926	1926-04-30	1926-09-21
1927	1927-05-17	1927-10-26
1928	1928-05-09	1928-10-11
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-09-24
1931	1931-04-08	1931-09-20
1932	1932-05-13	1932-10-02
1933	1933-05-18	1933-09-25
1934	1934-05-06	1934-10-12
1935	1935-06-16	1935-09-22
1936	1936-04-30	1936-09-22
1937	1937-05-29	1937-10-29
1938	1938-06-14	1938-10-16
1939	1939-04-24	1939-10-07
1940	1940-05-13	1940-10-25
1941	1941-05-14	1941-09-19
1942	1942-05-28	1942-10-02
1943	1943-05-29	1943-10-09
1944	1944-05-14	1944-09-07
1945	1945-06-27	1945-09-07
1948	1948-05-20	1948-09-20
1949	1949-04-25	1949-10-08
1950	1950-04-22	1950-10-31
1951	1951-06-01	1951-10-03
1952	1952-04-29	1952-09-30
1954	1954-04-24	1954-10-03
1955	1955-04-18	1955-09-18
1956	1956-05-09	1956-10-12
1957	1957-06-05	1957-09-01
1958	1958-05-11	1958-09-24
1959	1959-05-01	1959-09-20
1960	1960-04-22	1960-09-07
1961	1961-06-10	1961-09-10
1962	1962-05-05	1962-09-13
1963	1963-05-08	1963-10-10
1964	1964-04-16	1964-09-09
1965	1965-04-30	1965-09-09
1966	1966-05-05	1966-08-31
1967	1967-04-16	1967-10-02
1968	1968-05-02	1968-08-23
1969	1969-05-27	1969-10-04
1970	1970-04-28	1970-09-20
1971	1971-06-03	1971-10-02
1972	1972-04-06	1972-09-19
1973	1973-06-07	1973-09-21
1974	1974-06-15	1974-09-26
1975	1975-05-19	1975-10-14
1976	1976-05-21	1976-10-02
1977	1977-04-10	1977-08-28
1978	1978-05-25	1978-09-18
1979	1979-05-17	1979-10-20
1980	1980-04-20	1980-09-20
1981	1981-04-02	1981-09-30
1986	1986-03-29	1986-09-26
1987	1987-04-19	1987-09-05
1988	1988-05-14	1988-09-22
1989	1989-04-24	1989-09-07
1990	1990-04-23	1990-10-05
1991	1991-04-06	1991-09-13
1992	1992-04-29	1992-08-10
1993	1993-06-27	1993-09-12
1994	1994-04-18	1994-09-30
1995	1995-06-07	1995-08-31
1996	1996-05-17	1996-08-06
1997	1997-05-18	1997-10-06
1998	1998-05-20	1998-09-27
1999	1999-06-05	1999-09-08
2000	2000-05-12	2000-09-19
2001	2001-05-16	2001-09-06
2002	2002-04-16	2002-10-01
2003	2003-05-31	2003-10-21
2004	2004-04-17	2004-09-15
2005	2005-06-07	2005-10-05
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-09-22
2008	2008-05-26	2008-09-02
2009	2009-06-18	2009-08-14
2010	2010-05-25	2010-09-21
2011	2011-04-11	2011-09-13
2012	2012-04-26	2012-09-12
2013	2013-05-15	2013-09-19
2023	2023-05-08	2023-10-03
2024	2024-04-15	2024-10-12
2025	2025-05-11	2025-10-05
2026	2026-03-22	2026-10-14

Every Fixed Threshold

Fixed thresholds at Winterset 4N
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	114	98	1934	65
35 C (95 F): Days	95	58	1934	5
40 C (104 F): Days	14	19	1934	1
90 F (32.2 C): Days	113	83	1934	24
100 F (37.8 C): Days	33	36	1936	1
110 F (43.3 C): Days	3	5	1934	2
0 C (32 F): Ice days (max	114	80	1978	23
0 C (32 F): Frost days (min	115	177	1976	77
-10 C (14 F): Days with min	115	75	1978	27
-20 C (-4 F): Days with min	113	32	1963	6
-30 C (-22 F): Days with min	26	4	1963	1
20 C (68 F): Tropical nights (min	115	54	1934	14
25 C (77 F): Days with min	37	14	1934	4
10 mm (0.39 in): Days with 10 mm or more rain	111	43	2010	25
25 mm (0.98 in): Days with 25 mm or more rain	111	15	1973	10
50 mm (1.97 in): Days with 50 mm or more rain	81	6	1896	3
100 mm (3.94 in): Days with 100 mm or more rain	11	2	1977	1
10 cm (3.9 in): Days with 10 cm or more snowfall	70	7	1997	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1939	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.

Download the Data

Data for Winterset 4N 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).

Winterset 4N Threshold Days by Year (USC00139132)

Key Facts for Winterset 4N Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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