Willard 4 SW Threshold Days by Year (USC00319423)

18 fixed thresholds counted per year at Willard 4 SW (USC00319423): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willard 4 SW Thresholds

Willard 4 SW: days with 10 mm (0.39 in) or more of precipitation in 98 years, most in 1922 with 58.
Willard 4 SW: days with 25 mm (0.98 in) or more of precipitation in 98 years, most in 1913 with 24.
Willard 4 SW: nights with a minimum temperature at or below 0 C (32 F) in 95 years, most in 1915 with 87.
Willard 4 SW: nights with a minimum temperature at or above 20 C (68 F) in 95 years, most in 1947 with 108.
18 fixed thresholds have at least one qualifying day at Willard 4 SW.

Days at or above 30 C (86 F)

94 years with a qualifying day

Days per year at Willard 4 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 131 in 2002.

Days at or above 30 C (86 F) per year at Willard 4 SW
Year	Days	Decade average
1909	93	93
1910	91	95
1911	119	95
1912	86	95
1913	84	95
1914	106	95
1915	97	95
1916	74	95
1917	103	95
1922	64	93
1923	90	93
1924	65	93
1925	127	93
1926	110	93
1927	94	93
1928	97	93
1929	97	93
1930	100	99.4
1931	113	99.4
1932	93	99.4
1933	103	99.4
1934	99	99.4
1936	98	99.4
1937	95	99.4
1938	93	99.4
1939	101	99.4
1940	88	97.6
1941	126	97.6
1942	109	97.6
1943	100	97.6
1944	99	97.6
1945	99	97.6
1946	72	97.6
1947	86	97.6
1948	99	97.6
1950	89	102.2
1951	109	102.2
1952	108	102.2
1953	101	102.2
1954	120	102.2
1955	89	102.2
1956	101	102.2
1957	111	102.2
1958	91	102.2
1959	103	102.2
1960	101	88.6
1961	90	88.6
1962	101	88.6
1963	91	88.6
1964	81	88.6
1965	95	88.6
1966	71	88.6
1967	73	88.6
1968	90	88.6
1969	93	88.6
1970	113	97.3
1971	96	97.3
1972	79	97.3
1973	106	97.3
1974	89	97.3
1975	88	97.3
1976	83	97.3
1977	110	97.3
1978	116	97.3
1979	93	97.3
1980	125	102.2
1981	101	102.2
1982	99	102.2
1983	103	102.2
1984	98	102.2
1985	107	102.2
1986	113	102.2
1987	100	102.2
1988	84	102.2
1989	92	102.2
1990	104	89.6
1991	91	89.6
1993	88	89.6
1994	71	89.6
1995	76	89.6
1996	68	89.6
1997	90	89.6
1998	115	89.6
1999	103	89.6
2000	110	105.1
2002	131	105.1
2003	89	105.1
2004	123	105.1
2006	99	105.1
2007	115	105.1
2008	93	105.1
2009	81	105.1
2010	123	121
2011	119	121

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

First to last qualifying date each year at Willard 4 SW
Year	First date	Last date
1909	1909-04-05	1909-09-24
1910	1910-03-27	1910-10-23
1911	1911-04-07	1911-10-07
1912	1912-03-17	1912-10-11
1913	1913-05-02	1913-09-27
1914	1914-04-27	1914-10-11
1915	1915-04-19	1915-10-03
1916	1916-04-13	1916-10-16
1917	1917-04-01	1917-10-17
1922	1922-04-11	1922-10-11
1923	1923-04-22	1923-09-25
1924	1924-04-09	1924-10-19
1925	1925-04-12	1925-10-17
1926	1926-04-23	1926-10-20
1927	1927-04-17	1927-10-24
1928	1928-05-04	1928-10-18
1929	1929-03-24	1929-09-29
1930	1930-04-11	1930-10-17
1931	1931-04-09	1931-10-25
1932	1932-04-23	1932-09-23
1933	1933-05-06	1933-10-01
1934	1934-04-03	1934-09-30
1936	1936-03-31	1936-10-01
1937	1937-04-18	1937-10-30
1938	1938-03-31	1938-10-19
1939	1939-04-16	1939-10-24
1940	1940-04-01	1940-10-26
1941	1941-04-14	1941-10-23
1942	1942-04-05	1942-09-27
1943	1943-04-28	1943-09-16
1944	1944-05-14	1944-10-07
1945	1945-03-16	1945-10-24
1946	1946-04-03	1946-09-24
1947	1947-04-06	1947-10-19
1948	1948-03-20	1948-09-22
1950	1950-04-24	1950-09-21
1951	1951-04-30	1951-10-07
1952	1952-04-20	1952-10-06
1953	1953-05-11	1953-10-20
1954	1954-04-15	1954-10-13
1955	1955-04-20	1955-10-01
1956	1956-04-30	1956-10-03
1957	1957-04-21	1957-09-23
1958	1958-04-19	1958-09-26
1959	1959-04-20	1959-10-10
1960	1960-04-22	1960-10-03
1961	1961-04-23	1961-09-27
1962	1962-04-23	1962-10-13
1963	1963-04-03	1963-09-21
1964	1964-04-21	1964-09-30
1965	1965-04-12	1965-09-24
1966	1966-05-29	1966-10-05
1967	1967-04-02	1967-10-06
1968	1968-04-19	1968-10-03
1969	1969-05-05	1969-10-20
1970	1970-04-21	1970-10-15
1971	1971-04-13	1971-09-21
1972	1972-04-14	1972-09-30
1973	1973-03-15	1973-10-05
1974	1974-03-07	1974-09-29
1975	1975-04-18	1975-09-21
1976	1976-03-03	1976-09-27
1977	1977-04-03	1977-10-02
1978	1978-04-01	1978-09-28
1979	1979-04-01	1979-10-21
1980	1980-04-23	1980-10-11
1981	1981-03-31	1981-10-06
1982	1982-03-13	1982-09-18
1983	1983-04-27	1983-10-05
1984	1984-04-27	1984-10-20
1985	1985-03-14	1985-10-15
1986	1986-03-31	1986-10-06
1987	1987-04-30	1987-09-19
1988	1988-04-06	1988-09-25
1989	1989-03-29	1989-09-21
1990	1990-03-12	1990-10-13
1991	1991-03-22	1991-09-20
1993	1993-05-17	1993-09-26
1994	1994-05-16	1994-09-02
1995	1995-04-17	1995-09-22
1996	1996-05-05	1996-10-30
1997	1997-03-29	1997-10-09
1998	1998-03-30	1998-10-02
1999	1999-04-05	1999-10-10
2000	2000-05-06	2000-10-07
2002	2002-03-16	2002-10-06
2003	2003-04-30	2003-09-21
2004	2004-04-20	2004-10-01
2006	2006-04-14	2006-10-05
2007	2007-04-25	2007-10-24
2008	2008-05-10	2008-09-16
2009	2009-05-03	2009-10-09
2010	2010-04-01	2010-10-12
2011	2011-03-24	2011-09-30

Every Fixed Threshold

Fixed thresholds at Willard 4 SW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	94	131	2002	119
35 C (95 F): Days	92	38	1998	30
40 C (104 F): Days	4	2	1936	1
90 F (32.2 C): Days	94	92	2002	71
100 F (37.8 C): Days	32	12	1914	6
0 C (32 F): Ice days (max	32	5	1970	1
0 C (32 F): Frost days (min	95	87	1915	64
-10 C (14 F): Days with min	59	7	1917	2
-20 C (-4 F): Days with min	1	1	1989	1
20 C (68 F): Tropical nights (min	95	108	1947	61
25 C (77 F): Days with min	39	5	1947	2
10 mm (0.39 in): Days with 10 mm or more rain	98	58	1922	36
25 mm (0.98 in): Days with 25 mm or more rain	98	24	1913	14
50 mm (1.97 in): Days with 50 mm or more rain	94	7	1959	5
100 mm (3.94 in): Days with 100 mm or more rain	32	3	1999	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1996	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	3	1980	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1973	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

Download the Data

Data for Willard 4 SW 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).

Willard 4 SW Threshold Days by Year (USC00319423)

Key Facts for Willard 4 SW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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