Charleston Downtown, SC: September

30 September 2026: September 2026 averaged 79.6°F in Charleston Downtown, SC, the warmest September since 2018, tied 13th warmest of 133 (with 1906).

September 2026

Mean temperature: 79.6°F; Warmest since 2018; 13th warmest of 133
Precipitation: 0.22 in; Driest on record; Driest of 133, provisional

A normal September in Charleston Downtown, SC (1991 to 2020): a mean temperature of 77.5°F, between 75.6°F and 79.8°F in eight years of ten and 5.09 in of precipitation, between 2.15 in and 7.82 in in eight years of ten.

The mean temperature of every September in Charleston Downtown, SC since 1893: 79.6°F in 2026; the highest is 82.3°F, in 1925.

Normal range, 75.6 to 79.8°F

Every year, ranked, as a table

Every September in Charleston Downtown, SC from 1893 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	79.6	13	84.6	31	74.5	9	0.22	133	0
2025	76.5	83	81.8	94	71.2	73	1.04	124	0
2024	77.6	57	81.9	90	73.3	26	4.47	64	0
2023	77.3	64	82.7	71	71.9	54	5.74	43	0
2022	77.9	47	82.9	67	73	30	7.82	23	0
2021	79	26	84.6	31	73.3	26	5.41	48	0
2020	77.2	66	82.5	77	71.9	54	5.98	40	0
2019	79.4	17	83.8	48	75.1	5	6.08	39	0
2018	81.8	3	86.4	8	77.2	1	0.95	126	0
2017	78.6	32	84.1	42	73	30	6.60	35	0
2016	79.2	22	84.8	25	73.7	21	7.79	24	0
2015	78	46	83.1	61	72.9	34	3.45	81	0
2014									9
2013	76.8	78	82.2	81	71.3	71	4.30	69	0
2012	77.6	57	82.4	79	72.7	39	0.57	130	0
2011	77.4	62	82.9	67	72	49	4.05	72	0
2010	80.3	8	85.9	11	74.8	6	5.68	44	0
2009	76.5	83	81.9	90	71.1	76	0.98	125	0
2008	76.9	75	81.8	94	72	49	6.17	37	0
2007	77.9	47	83	64	72.8	37	4.93	60	0
2006	76.5	83	82.1	84	70.8	82	2.44	97	0
2005	79.7	12	84.8	25	74.7	7	3.50	80	0
2004	76.6	80	81	114	72.2	43	3.66	78	0
2003	76	97	80.8	118	71.3	71	3.95	74	0
2002	79.5	15	83.7	53	75.3	4	6.10	38	0
2001	75.6	103	81.7	100	69.5	106	4.08	71	0
2000	76.5	83	82	85	70.9	77	5.85	42	0
1999	75.1	117	80.6	121	69.5	106	7.96	22	0
1998	81.3	4	86.8	6	75.8	3	10.77	12	0
1997	79.4	17	84.7	29	74.1	14	7.66	27	0
1996	77.5	61	82.9	67	72.1	47	5.09	57	0
1995	75.3	112	79.9	129	70.6	88	5.05	58	0
1994	75.5	104	81.1	113	69.8	100	7.42	29	0
1993	78.9	28	83.8	48	73.9	17	4.21	70	0
1992	76.4	89	81.3	110	71.5	66	6.36	36	0
1991	77.7	54	83.4	58	71.9	54	8.52	17	0
1990	78.9	28	84.2	38	73.5	25	0.91	127	0
1989	76.3	90	80.6	121	71.9	54	13.94	4	0
1988	76.1	95	80.6	121	71.6	62	13.34	6	0
1987	77.6	57	82.9	67	72.3	42	14.96	2	0
1986	77.9	47	83.1	61	72.8	37	1.61	115	0
1985	77.2	66	83.6	55	70.7	86	0.51	131	0
1984	73.6	130	80.1	127	67	131	3.87	75	0
1983	75	119	82.2	81	67.8	128	6.89	34	0
1982	75.4	107	82.2	81	68.7	119	5.24	50	0
1981	76.1	95	82.7	71	69.6	102	1.09	122	0
1980	80.7	6	87.3	4	74	15	2.68	93	0
1979	76.6	80	81.4	106	71.8	59	11.72	9	0
1978	78.3	39	84.6	31	72	49	7.53	28	0
1977	80.5	7	87	5	73.9	17	4.44	65	0
1976	75.5	104	81.6	102	69.4	112	4.90	61	0
1975	77.3	64	83.4	58	71.2	73	2.40	99	0
1974	74.4	126	80.5	125	68.4	121	10.83	11	0
1973	79	26	84.8	25	73.2	28	5.19	55	0
1972	77.6	57	84.7	29	70.4	93	2.14	105	0
1971	78.4	35	84.5	36	72.2	43	0.83	128	0
1970	79.4	17	85.2	17	73.6	22	1.75	113	0
1969	74.6	124	79.8	131	69.4	112	4.49	63	0
1968	76.2	93	82.7	71	69.7	101	3.15	87	0
1967	72.2	133	79	133	65.4	133	1.13	120	0
1966	77.1	72	83.5	56	70.8	82	2.02	109	0
1965	77.1	72	82.3	80	72	49	1.67	114	0
1964	76.5	83	82.5	77	70.4	93	2.71	92	0
1963	73.7	129	80	128	67.4	129	3.59	79	0
1962	75.2	116	81.6	102	68.8	118	3.39	82	0
1961	77.9	47	84.2	38	71.6	62	1.21	118	0
1960	77.2	66	82.7	71	71.6	62	8.17	19	0
1959	76.2	93	81.8	94	70.6	88	9.94	15	0
1958	77.8	52	83.9	46	71.7	60	5.94	41	0
1957	78.4	35	83.8	48	73.1	29	9.25	16	0
1956	74.7	123	81.4	106	68	124	5.56	46	0
1955	76.9	75	81.8	94	71.9	54	13.63	5	0
1954	78.3	39	83.7	53	73	30	5.20	54	0
1953	77	74	82.7	71	71.2	73	4.41	66	0
1952	75.4	107	81.4	106	69.4	112	7.67	26	0
1951	76.3	90	81.8	94	70.9	77	8.07	21	0
1950	75.7	101	81.7	100	69.6	102	5.68	44	0
1949	75.4	107	81.2	112	69.6	102	8.16	20	0
1948	75.4	107	81.4	106	69.4	112	7.71	25	0
1947	77.2	66	84	44	70.3	95	10.18	14	0
1946	75.7	101	81.8	94	69.5	106	3.31	83	0
1945	80.3	8	86.1	10	74.6	8	16.24	1	0
1944	78.5	33	85.6	12	71.4	67	4.95	59	0
1943	74.8	122	81.6	102	68	124	2.41	98	0
1942	78.1	43	85.6	12	70.5	91	5.23	53	0
1941	78.4	35	85.1	20	71.7	60	0.78	129	0
1940	74.9	121	81.9	90	67.9	127	2.16	103	0
1939	79.1	24	85.4	14	72.9	34	1.16	119	0
1938	77.7	54	84.6	31	70.7	86	5.24	50	0
1937	75.5	104	81.9	90	69.1	116	4.34	68	0
1936	78.8	30	85	22	72.6	40	2.47	96	0
1935	76	97	82	85	70	97	5.53	47	0
1934	78.2	41	84.2	38	72.2	43	4.04	73	0
1933	81.2	5	87.9	3	74.4	10	13.04	7	0
1932	76.5	83	82	85	70.9	77	7.18	31	0
1931	78.7	31	85.3	16	72.1	47	2.08	107	0
1930	80.3	8	86.3	9	74.2	13	3.22	85	0
1929	75.9	99	80.9	117	70.9	77	3.86	76	0
1928	75.8	100	82	85	69.5	106	14.30	3	0
1927	78.1	43	84.8	25	71.4	67	1.23	117	0
1926	79.4	17	85.2	17	73.6	22	2.66	94	0
1925	82.3	1	88	2	76.5	2	1.94	110	0
1924	74.6	124	80.2	126	68.9	117	11.85	8	0
1923	77.8	52	84.2	38	71.4	67	2.11	106	0
1922	76.9	75	83.2	60	70.5	91	1.13	120	0
1921	81.9	2	89.4	1	74.4	10	5.19	55	0
1920	77.9	47	84.9	24	70.8	82	8.30	18	0
1919	76.3	90	82.6	76	70	97	1.76	112	0
1918	73.3	132	80.6	121	65.9	132	3.10	88	0
1917	73.4	131	79.3	132	67.4	129	2.34	101	0
1916	75.1	117	82	85	68.2	123	2.76	89	0
1915	79.1	24	85.4	14	72.9	34	2.07	108	0
1914	74.4	126	80.7	119	68	124	4.69	62	0
1913	75	119	81.6	102	68.4	121	7.26	30	0
1912	79.2	22	84.6	31	73.8	19	10.42	13	0
1911	80.2	11	86.5	7	73.8	19	5.24	50	0
1910	77.2	66	83.5	56	70.8	82	4.39	67	0
1909	74.3	128	79.9	129	68.7	119	5.35	49	0
1908	75.4	107	81.3	110	69.5	106	1.06	123	0
1907	79.4	17	85.2	17	73.6	22	2.73	91	0
1906	79.6	13	85	22	74.3	12	3.31	83	0
1905	78.5	33	84	44	73	30	2.16	103	0
1904	76.6	80	83	64	70.1	96	3.17	86	0
1903	75.3	112	81	114	69.5	106	2.36	100	0
1902	75.3	112	81	114	69.6	102	3.73	77	0
1901	77.2	66	83.1	61	71.4	67	0.40	132	0
1900	79.5	15	85.1	20	74	15	2.34	101	0
1899	76.8	78	83	64	70.6	88	1.77	111	0
1898	78.2	41	83.9	46	72.5	41	1.49	116	0
1897	75.3	112	80.7	119	70	97	2.61	95	0
1896	77.4	62	83.8	48	70.9	77	2.75	90	0
1895	78.4	35	84.5	36	72.2	43	6.94	33	0
1894	77.7	54	83.8	48	71.6	62	10.94	10	0
1893	78.1	43	84.1	42	72	49	7.10	32	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1925	82.3
1921	81.9
2018	81.8
1998	81.3
1933	81.2
1980	80.7
1977	80.5
2010	80.3
1945	80.3
1930	80.3

Coldest
Year	Mean, °F
1967	72.2
1918	73.3
1917	73.4
1984	73.6
1963	73.7
1909	74.3
1974	74.4
1914	74.4
1969	74.6
1924	74.6

Wettest
Year	Precipitation, in
1945	16.24
1987	14.96
1928	14.30
1989	13.94
1955	13.63
1988	13.34
1933	13.04
1924	11.85
1979	11.72
1894	10.94

Driest
Year	Precipitation, in
2026	0.22
1901	0.40
1985	0.51
2012	0.57
1941	0.78
1971	0.83
1990	0.91
2018	0.95
2009	0.98
2025	1.04

The hottest, coldest and wettest days

Hottest day: 91°F; 18 September 2026, 14 September 2026
Coldest night: 62°F; 26 September 2026, 25 September 2026
Wettest day: 0.12 in; 12 September 2026

Every month, season and year

Months

Seasons

Years

Charleston Downtown, SC the day's answers

All-time records

Every answer in words

September 2026 brought 0.22 in of precipitation in Charleston Downtown, SC, the driest September on record, in 133 years since 1893 (2014 excluded: 9 of 30 days missing); provisional.
The hottest day of September 2026 in Charleston Downtown, SC: 91°F on Friday 18 September 2026 and Monday 14 September 2026.
The coldest night of September 2026 in Charleston Downtown, SC: a low of 62°F on Saturday 26 September 2026 and Friday 25 September 2026.
The wettest day of September 2026 in Charleston Downtown, SC: 0.12 in on Saturday 12 September 2026.