Charleston Threshold Days by Year (USC00111436)

19 fixed thresholds counted per year at Charleston (USC00111436): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Charleston Thresholds

Charleston: days with 10 mm (0.39 in) or more of precipitation in 121 years, most in 1927 with 50.
Charleston: days with 25 mm (0.98 in) or more of precipitation in 121 years, most in 1927 with 18.
Charleston: nights with a minimum temperature at or below 0 C (32 F) in 120 years, most in 1926 with 138.
Charleston: nights with a minimum temperature at or below -10 C (14 F) in 120 years, most in 1978 with 48.
19 fixed thresholds have at least one qualifying day at Charleston.

Days at or above 30 C (86 F)

118 years with a qualifying day

Days per year at Charleston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 101 in 1936.

Days at or above 30 C (86 F) per year at Charleston
Year	Days	Decade average
1897	63	66.3
1898	59	66.3
1899	77	66.3
1902	54	55.5
1903	49	55.5
1904	42	55.5
1905	56	55.5
1906	76	55.5
1907	43	55.5
1908	74	55.5
1909	50	55.5
1910	41	64.3
1911	83	64.3
1912	43	64.3
1914	94	64.3
1915	26	64.3
1916	83	64.3
1917	51	64.3
1918	71	64.3
1919	87	64.3
1920	66	71.2
1921	89	71.2
1922	87	71.2
1923	60	71.2
1924	55	71.2
1925	88	71.2
1926	72	71.2
1927	60	71.2
1928	66	71.2
1929	69	71.2
1930	86	85
1931	93	85
1932	95	85
1933	97	85
1934	94	85
1935	65	85
1936	101	85
1937	73	85
1938	71	85
1939	75	85
1940	70	66.9
1941	85	66.9
1942	61	66.9
1943	79	66.9
1946	57	66.9
1947	59	66.9
1948	59	66.9
1949	65	66.9
1953	77	70.4
1954	90	70.4
1955	80	70.4
1956	70	70.4
1957	57	70.4
1958	35	70.4
1959	84	70.4
1960	58	59.4
1961	64	59.4
1962	70	59.4
1963	67	59.4
1964	79	59.4
1965	46	59.4
1966	61	59.4
1967	40	59.4
1968	55	59.4
1969	54	59.4
1970	55	47.6
1971	42	47.6
1972	51	47.6
1973	38	47.6
1974	37	47.6
1975	55	47.6
1976	48	47.6
1977	58	47.6
1978	54	47.6
1979	38	47.6
1980	67	48.4
1981	26	48.4
1982	21	48.4
1983	70	48.4
1984	56	48.4
1985	26	48.4
1986	48	48.4
1987	64	48.4
1988	77	48.4
1989	29	48.4
1990	33	54.8
1991	66	54.8
1992	30	54.8
1993	58	54.8
1994	60	54.8
1995	65	54.8
1996	53	54.8
1997	49	54.8
1998	69	54.8
1999	65	54.8
2000	43	57.8
2001	63	57.8
2002	80	57.8
2003	40	57.8
2004	45	57.8
2005	78	57.8
2006	59	57.8
2007	79	57.8
2009	33	57.8
2010	86	75.3
2011	77	75.3
2012	91	75.3
2014	59	75.3
2015	53	75.3
2016	76	75.3
2019	85	75.3
2020	66	74.3
2021	78	74.3
2022	59	74.3
2023	67	74.3
2024	79	74.3
2025	85	74.3
2026	86	74.3

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

First to last qualifying date each year at Charleston
Year	First date	Last date
1897	1897-06-11	1897-10-16
1898	1898-06-02	1898-09-28
1899	1899-04-29	1899-10-15
1902	1902-05-02	1902-09-08
1903	1903-05-16	1903-10-03
1904	1904-05-21	1904-09-28
1905	1905-05-10	1905-10-08
1906	1906-04-27	1906-09-21
1907	1907-03-21	1907-09-19
1908	1908-05-15	1908-09-26
1909	1909-05-05	1909-09-14
1910	1910-06-15	1910-09-18
1911	1911-05-09	1911-09-27
1912	1912-05-23	1912-09-10
1914	1914-04-22	1914-10-06
1915	1915-04-25	1915-09-26
1916	1916-05-06	1916-10-08
1917	1917-04-18	1917-09-05
1918	1918-05-19	1918-10-05
1919	1919-05-29	1919-10-03
1920	1920-05-27	1920-09-26
1921	1921-05-20	1921-09-29
1922	1922-05-11	1922-10-05
1923	1923-06-03	1923-09-28
1924	1924-04-25	1924-10-10
1925	1925-04-22	1925-09-28
1926	1926-05-01	1926-10-03
1927	1927-05-09	1927-10-28
1928	1928-05-03	1928-10-11
1929	1929-03-24	1929-09-28
1930	1930-04-10	1930-10-14
1931	1931-05-16	1931-10-06
1932	1932-05-04	1932-10-02
1933	1933-05-20	1933-09-30
1934	1934-05-04	1934-09-26
1935	1935-06-12	1935-10-14
1936	1936-05-06	1936-09-23
1937	1937-04-17	1937-10-01
1938	1938-05-02	1938-10-18
1939	1939-05-17	1939-10-09
1940	1940-05-07	1940-09-22
1941	1941-04-13	1941-09-24
1942	1942-04-29	1942-09-30
1943	1943-05-05	1943-09-30
1946	1946-06-07	1946-10-07
1947	1947-06-09	1947-10-15
1948	1948-05-21	1948-09-20
1949	1949-05-03	1949-09-05
1953	1953-05-25	1953-10-22
1954	1954-04-26	1954-10-04
1955	1955-05-04	1955-09-30
1956	1956-05-12	1956-10-15
1957	1957-06-06	1957-09-03
1958	1958-05-14	1958-09-25
1959	1959-05-02	1959-10-04
1960	1960-04-23	1960-09-24
1961	1961-05-31	1961-09-24
1962	1962-05-13	1962-10-12
1963	1963-05-08	1963-10-15
1964	1964-05-18	1964-09-11
1965	1965-05-13	1965-09-20
1966	1966-05-27	1966-09-03
1967	1967-05-24	1967-10-04
1968	1968-05-02	1968-09-23
1969	1969-05-28	1969-09-06
1970	1970-05-12	1970-09-09
1971	1971-06-04	1971-10-02
1972	1972-05-21	1972-09-20
1973	1973-06-09	1973-09-03
1974	1974-06-20	1974-08-27
1975	1975-05-19	1975-10-13
1976	1976-05-21	1976-10-02
1977	1977-04-15	1977-09-02
1978	1978-05-25	1978-09-20
1979	1979-06-05	1979-09-11
1980	1980-04-22	1980-10-08
1981	1981-06-07	1981-08-15
1982	1982-05-16	1982-08-19
1983	1983-06-21	1983-10-03
1984	1984-06-05	1984-09-20
1985	1985-05-26	1985-09-10
1986	1986-04-25	1986-09-29
1987	1987-04-21	1987-09-14
1988	1988-05-15	1988-09-21
1989	1989-04-26	1989-10-13
1990	1990-06-08	1990-09-06
1991	1991-05-17	1991-09-29
1992	1992-05-16	1992-09-09
1993	1993-05-08	1993-09-02
1994	1994-05-22	1994-10-01
1995	1995-06-07	1995-09-13
1996	1996-05-17	1996-09-02
1997	1997-05-18	1997-10-07
1998	1998-05-14	1998-09-27
1999	1999-06-05	1999-09-28
2000	2000-05-24	2000-09-19
2001	2001-04-30	2001-09-13
2002	2002-04-17	2002-10-03
2003	2003-05-09	2003-08-28
2004	2004-05-06	2004-09-15
2005	2005-05-10	2005-10-05
2006	2006-04-15	2006-10-04
2007	2007-04-30	2007-10-08
2009	2009-05-22	2009-08-27
2010	2010-05-23	2010-10-11
2011	2011-05-11	2011-10-07
2012	2012-04-01	2012-09-07
2014	2014-05-08	2014-09-29
2015	2015-05-05	2015-09-25
2016	2016-05-29	2016-10-06
2019	2019-05-18	2019-10-02
2020	2020-05-25	2020-10-07
2021	2021-05-22	2021-09-25
2022	2022-05-10	2022-09-21
2023	2023-05-24	2023-10-03
2024	2024-04-15	2024-10-05
2025	2025-05-15	2025-10-04
2026	2026-03-22	2026-10-14

Every Fixed Threshold

Fixed thresholds at Charleston
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	118	101	1936	86
35 C (95 F): Days	104	48	1934	13
40 C (104 F): Days	12	13	1934	6
90 F (32.2 C): Days	118	80	1933	53
100 F (37.8 C): Days	40	26	1936	4
110 F (43.3 C): Days	1	2	1936	2
0 C (32 F): Ice days (max	118	52	1963	16
0 C (32 F): Frost days (min	120	138	1926	57
-10 C (14 F): Days with min	120	48	1978	19
-20 C (-4 F): Days with min	91	14	1979	2
-30 C (-22 F): Days with min	6	1	1899	1
20 C (68 F): Tropical nights (min	120	61	2010	51
25 C (77 F): Days with min	49	7	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	121	50	1927	33
25 mm (0.98 in): Days with 25 mm or more rain	121	18	1927	12
50 mm (1.97 in): Days with 50 mm or more rain	100	7	2000	4
100 mm (3.94 in): Days with 100 mm or more rain	14	1	1917	1
10 cm (3.9 in): Days with 10 cm or more snowfall	74	5	1982	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1908	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

Data for Charleston 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).

Charleston Threshold Days by Year (USC00111436)

Key Facts for Charleston Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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