Sumter Threshold Days by Year (USC00388440)

16 fixed thresholds counted per year at Sumter (USC00388440): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sumter Thresholds

Sumter: nights with a minimum temperature at or below 0 C (32 F) in 94 years, most in 1968 with 84.
Sumter: nights with a minimum temperature at or above 20 C (68 F) in 94 years, most in 2004 with 104.
Sumter: days with a maximum temperature at or above 30 C (86 F) in 93 years, most in 1941 with 148.
Sumter: days with a maximum temperature at or above 90 F (32.2 C) in 93 years, most in 1954 with 114.
16 fixed thresholds have at least one qualifying day at Sumter.

Days at or above 30 C (86 F)

93 years with a qualifying day

Days per year at Sumter with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 148 in 1941.

Days at or above 30 C (86 F) per year at Sumter
Year	Days	Decade average
1930	117	121
1931	126	121
1934	94	121
1935	125	121
1936	135	121
1937	122	121
1938	119	121
1939	130	121
1940	116	125.8
1941	148	125.8
1942	137	125.8
1943	126	125.8
1944	129	125.8
1945	147	125.8
1946	110	125.8
1947	122	125.8
1948	116	125.8
1949	107	125.8
1950	126	123.4
1951	129	123.4
1952	124	123.4
1953	130	123.4
1954	139	123.4
1956	113	123.4
1957	109	123.4
1958	117	123.4
1959	124	123.4
1960	126	103.1
1961	96	103.1
1962	117	103.1
1963	102	103.1
1964	100	103.1
1965	104	103.1
1966	82	103.1
1967	88	103.1
1968	121	103.1
1969	95	103.1
1970	127	111.9
1971	115	111.9
1972	100	111.9
1973	116	111.9
1974	118	111.9
1975	113	111.9
1976	86	111.9
1977	132	111.9
1978	125	111.9
1979	87	111.9
1980	130	113.1
1981	115	113.1
1982	114	113.1
1983	109	113.1
1984	106	113.1
1985	112	113.1
1986	130	113.1
1987	111	113.1
1988	103	113.1
1989	101	113.1
1990	132	109
1991	104	109
1992	90	109
1993	129	109
1994	100	109
1995	106	109
1996	97	109
1997	97	109
1998	126	109
2000	111	100.8
2001	106	100.8
2002	122	100.8
2003	81	100.8
2004	92	100.8
2005	110	100.8
2006	97	100.8
2007	112	100.8
2008	90	100.8
2009	87	100.8
2010	120	91.5
2011	106	91.5
2012	59	91.5
2013	46	91.5
2014	68	91.5
2015	76	91.5
2016	98	91.5
2017	117	91.5
2018	114	91.5
2019	111	91.5
2020	91	101.9
2021	94	101.9
2022	107	101.9
2023	99	101.9
2024	112	101.9
2025	99	101.9
2026	111	101.9

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

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

Every Fixed Threshold

Fixed thresholds at Sumter
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	93	148	1941	111
35 C (95 F): Days	89	63	1954	29
40 C (104 F): Days	9	5	1986	1
90 F (32.2 C): Days	93	114	1954	73
100 F (37.8 C): Days	54	17	1954	2
0 C (32 F): Ice days (max	35	4	2014	1
0 C (32 F): Frost days (min	94	84	1968	33
-10 C (14 F): Days with min	46	7	2014	2
20 C (68 F): Tropical nights (min	94	104	2004	79
25 C (77 F): Days with min	28	14	2025	12
10 mm (0.39 in): Days with 10 mm or more rain	93	53	1961	13
25 mm (0.98 in): Days with 25 mm or more rain	93	23	1964	4
50 mm (1.97 in): Days with 50 mm or more rain	88	8	1959	3
100 mm (3.94 in): Days with 100 mm or more rain	23	2	1973	1
200 mm (7.87 in): Days with 200 mm or more rain	4	2	2015	2
10 cm (3.9 in): Days with 10 cm or more snowfall	4	1	1936	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1930.

Download the Data

Data for Sumter 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).

Sumter Threshold Days by Year (USC00388440)

Key Facts for Sumter Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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