Dwtn Charleston Threshold Days by Year (USW00013782)

15 fixed thresholds counted per year at Dwtn Charleston (USW00013782): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dwtn Charleston Thresholds

Dwtn Charleston: days with 10 mm (0.39 in) or more of precipitation in 134 years, most in 1947 with 57.
Dwtn Charleston: days with 25 mm (0.98 in) or more of precipitation in 134 years, most in 1964 with 26.
Dwtn Charleston: days with a maximum temperature at or above 30 C (86 F) in 133 years, most in 1998 with 116.
Dwtn Charleston: days with a maximum temperature at or above 90 F (32.2 C) in 133 years, most in 1998 with 71.
15 fixed thresholds have at least one qualifying day at Dwtn Charleston.

Days at or above 30 C (86 F)

133 years with a qualifying day

Days per year at Dwtn Charleston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 116 in 1998.

Days at or above 30 C (86 F) per year at Dwtn Charleston
Year	Days	Decade average
1893	63	70.9
1894	57	70.9
1895	85	70.9
1896	77	70.9
1897	63	70.9
1898	76	70.9
1899	75	70.9
1900	71	65.8
1901	60	65.8
1902	63	65.8
1903	55	65.8
1904	64	65.8
1905	59	65.8
1906	74	65.8
1907	83	65.8
1908	71	65.8
1909	58	65.8
1910	62	70.7
1911	89	70.7
1912	65	70.7
1913	66	70.7
1914	76	70.7
1915	94	70.7
1916	64	70.7
1917	64	70.7
1918	61	70.7
1919	66	70.7
1920	68	73.6
1921	83	73.6
1922	68	73.6
1923	61	73.6
1924	77	73.6
1925	92	73.6
1926	90	73.6
1927	79	73.6
1928	69	73.6
1929	49	73.6
1930	82	82.6
1931	77	82.6
1932	71	82.6
1933	100	82.6
1934	87	82.6
1935	71	82.6
1936	83	82.6
1937	80	82.6
1939	92	82.6
1940	65	74.9
1941	87	74.9
1942	83	74.9
1943	88	74.9
1944	77	74.9
1945	78	74.9
1946	50	74.9
1947	74	74.9
1948	71	74.9
1949	76	74.9
1950	65	71.9
1951	79	71.9
1952	77	71.9
1953	62	71.9
1954	79	71.9
1955	71	71.9
1956	84	71.9
1957	64	71.9
1958	75	71.9
1959	63	71.9
1960	65	62
1961	63	62
1962	67	62
1963	74	62
1964	55	62
1965	63	62
1966	52	62
1967	58	62
1968	70	62
1969	53	62
1970	84	79.3
1971	83	79.3
1972	71	79.3
1973	76	79.3
1974	57	79.3
1975	85	79.3
1976	65	79.3
1977	111	79.3
1978	93	79.3
1979	68	79.3
1980	105	75.6
1981	86	75.6
1982	77	75.6
1983	69	75.6
1984	81	75.6
1985	97	75.6
1986	79	75.6
1987	64	75.6
1988	41	75.6
1989	57	75.6
1990	70	66.2
1991	68	66.2
1992	48	66.2
1993	69	66.2
1994	47	66.2
1995	57	66.2
1996	56	66.2
1997	65	66.2
1998	116	66.2
1999	66	66.2
2000	72	60.1
2001	93	60.1
2002	56	60.1
2003	42	60.1
2004	45	60.1
2005	59	60.1
2006	72	60.1
2007	56	60.1
2008	52	60.1
2009	54	60.1
2010	95	76.5
2011	81	76.5
2012	52	76.5
2013	42	76.5
2014	87	76.5
2015	82	76.5
2016	87	76.5
2017	69	76.5
2018	103	76.5
2019	67	76.5
2020	82	77.6
2021	89	77.6
2022	76	77.6
2023	72	77.6
2024	69	77.6
2025	71	77.6
2026	84	77.6

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

First to last qualifying date each year at Dwtn Charleston
Year	First date	Last date
1893	1893-04-09	1893-09-25
1894	1894-04-29	1894-10-03
1895	1895-05-31	1895-10-07
1896	1896-04-21	1896-09-22
1897	1897-03-21	1897-09-17
1898	1898-05-03	1898-09-27
1899	1899-05-07	1899-09-14
1900	1900-04-07	1900-09-28
1901	1901-05-02	1901-09-17
1902	1902-05-03	1902-09-30
1903	1903-05-23	1903-09-13
1904	1904-04-16	1904-10-02
1905	1905-05-12	1905-09-23
1906	1906-04-27	1906-09-23
1907	1907-03-20	1907-10-08
1908	1908-04-02	1908-09-13
1909	1909-05-28	1909-09-10
1910	1910-04-02	1910-10-02
1911	1911-05-02	1911-10-07
1912	1912-04-30	1912-09-25
1913	1913-05-04	1913-10-01
1914	1914-04-27	1914-09-08
1915	1915-05-03	1915-10-01
1916	1916-04-13	1916-09-29
1917	1917-04-18	1917-09-28
1918	1918-05-08	1918-10-06
1919	1919-04-24	1919-10-28
1920	1920-05-01	1920-09-28
1921	1921-03-16	1921-10-03
1922	1922-04-14	1922-10-07
1923	1923-04-22	1923-09-22
1924	1924-04-08	1924-09-05
1925	1925-04-20	1925-10-17
1926	1926-05-09	1926-10-20
1927	1927-04-02	1927-10-04
1928	1928-05-11	1928-10-10
1929	1929-03-24	1929-09-14
1930	1930-04-12	1930-10-16
1931	1931-05-16	1931-09-26
1932	1932-04-06	1932-09-17
1933	1933-05-06	1933-09-30
1934	1934-04-07	1934-10-06
1935	1935-03-21	1935-09-22
1936	1936-04-16	1936-10-01
1937	1937-05-10	1937-10-07
1939	1939-04-27	1939-10-28
1940	1940-04-04	1940-09-22
1941	1941-04-15	1941-10-10
1942	1942-04-25	1942-09-24
1943	1943-05-20	1943-09-16
1944	1944-05-17	1944-10-07
1945	1945-05-29	1945-10-02
1946	1946-04-03	1946-09-25
1947	1947-05-07	1947-09-22
1948	1948-05-03	1948-09-10
1949	1949-05-20	1949-09-23
1950	1950-05-05	1950-09-22
1951	1951-03-08	1951-10-07
1952	1952-05-03	1952-10-02
1953	1953-05-11	1953-09-17
1954	1954-06-02	1954-10-06
1955	1955-05-11	1955-10-08
1956	1956-05-13	1956-09-20
1957	1957-05-20	1957-09-23
1958	1958-04-24	1958-10-10
1959	1959-04-20	1959-10-11
1960	1960-05-17	1960-10-09
1961	1961-05-16	1961-11-01
1962	1962-05-01	1962-10-09
1963	1963-03-18	1963-09-13
1964	1964-04-23	1964-09-30
1965	1965-04-09	1965-09-12
1966	1966-05-30	1966-10-05
1967	1967-04-07	1967-09-22
1968	1968-04-20	1968-10-03
1969	1969-06-16	1969-09-18
1970	1970-04-21	1970-09-27
1971	1971-04-13	1971-10-03
1972	1972-04-14	1972-10-17
1973	1973-05-11	1973-10-05
1974	1974-03-10	1974-09-29
1975	1975-05-22	1975-10-09
1976	1976-03-30	1976-09-28
1977	1977-03-16	1977-10-02
1978	1978-04-02	1978-10-06
1979	1979-06-01	1979-09-14
1980	1980-04-23	1980-10-19
1981	1981-04-13	1981-10-06
1982	1982-03-20	1982-09-20
1983	1983-05-24	1983-10-05
1984	1984-04-25	1984-09-15
1985	1985-04-23	1985-09-11
1986	1986-05-01	1986-10-05
1987	1987-04-30	1987-09-20
1988	1988-04-22	1988-09-24
1989	1989-04-24	1989-10-06
1990	1990-05-01	1990-10-15
1991	1991-05-01	1991-09-19
1992	1992-04-24	1992-09-23
1993	1993-05-17	1993-09-27
1994	1994-05-12	1994-09-15
1995	1995-04-22	1995-10-07
1996	1996-05-05	1996-09-23
1997	1997-03-22	1997-10-06
1998	1998-05-08	1998-10-04
1999	1999-04-08	1999-09-16
2000	2000-05-12	2000-10-06
2001	2001-04-08	2001-10-25
2002	2002-04-20	2002-10-06
2003	2003-05-07	2003-09-04
2004	2004-05-25	2004-09-28
2005	2005-05-09	2005-09-29
2006	2006-04-15	2006-10-06
2007	2007-06-08	2007-10-10
2008	2008-05-09	2008-09-16
2009	2009-05-10	2009-10-10
2010	2010-05-08	2010-09-25
2011	2011-03-22	2011-09-30
2012	2012-04-02	2012-09-07
2013	2013-06-07	2013-09-16
2014	2014-05-05	2014-10-13
2015	2015-04-26	2015-09-29
2016	2016-05-08	2016-09-30
2017	2017-05-09	2017-09-29
2018	2018-05-11	2018-10-17
2019	2019-05-24	2019-10-04
2020	2020-04-09	2020-10-13
2021	2021-04-30	2021-10-16
2022	2022-05-05	2022-09-26
2023	2023-05-17	2023-09-25
2024	2024-04-20	2024-10-14
2025	2025-05-16	2025-09-26
2026	2026-05-11	2026-10-02

Every Fixed Threshold

Fixed thresholds at Dwtn Charleston
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	133	116	1998	84
35 C (95 F): Days	121	24	1998	4
40 C (104 F): Days	2	1	1944	1
90 F (32.2 C): Days	133	71	1998	41
100 F (37.8 C): Days	30	4	1944	1
0 C (32 F): Ice days (max	27	3	1899	1
0 C (32 F): Frost days (min	129	30	1977	8
-10 C (14 F): Days with min	9	3	1917	1
20 C (68 F): Tropical nights (min	133	170	2019	151
25 C (77 F): Days with min	133	109	1998	83
10 mm (0.39 in): Days with 10 mm or more rain	134	57	1947	19
25 mm (0.98 in): Days with 25 mm or more rain	134	26	1964	5
50 mm (1.97 in): Days with 50 mm or more rain	129	12	1964	1
100 mm (3.94 in): Days with 100 mm or more rain	50	4	1945	2
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1933	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Dwtn 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).

Dwtn Charleston Threshold Days by Year (USW00013782)

Key Facts for Dwtn Charleston Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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