Hartford, CT: September

30 September 2026: September 2026 averaged 64°F in Hartford, CT, the warmest September since 2025, tied 57th warmest of 122 (with 1990 and 1977).

September 2026

Mean temperature: 64°F; Warmest since 2025; 57th warmest of 122
Precipitation: 5.58 in; Wettest since 2023; 25th wettest of 122

A normal September in Hartford, CT (1991 to 2020): a mean temperature of 64.8°F, between 62.2°F and 67.5°F in eight years of ten and 3.19 in of precipitation, between 1.61 in and 9.36 in in eight years of ten.

The mean temperature of every September in Hartford, CT since 1905: 64°F in 2026; the highest is 68.9°F, in 1921.

Normal range, 62.2 to 67.5°F

Every year, ranked, as a table

Every September in Hartford, CT from 1905 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
2026	64	57	73.3	85	54.7	31	5.58	25
2025	65.7	24	77.5	17	53.8	46	3.40	58
2024	66.9	15	78.2	10	55.5	22	0.65	119
2023	66.8	16	76.1	34	57.5	9	12.18	2
2022	65.1	37	75.4	45	54.7	31	6.08	22
2021	66.1	21	76.1	34	56.1	16	6.81	18
2020	64.8	43	76.6	28	53.1	62	2.11	88
2019	64.8	43	77.1	23	52.4	75	1.94	93
2018	67.1	12	75.6	43	58.6	2	6.33	21
2017	67.6	6	78.3	8	56.9	12	2.25	84
2016	67.1	12	78.2	10	56	17	2.42	77
2015	68.5	3	81.6	1	55.5	22	4.77	33
2014	65.3	33	77	24	53.5	55	1.62	98
2013	62.6	89	74.6	61	50.5	108	3.58	50
2012	64.4	48	75	52	53.7	53	4.57	37
2011	67.5	7	76.7	27	58.4	3	9.65	6
2010	67.5	7	78.8	7	56.3	15	2.56	73
2009	62.1	96	73.5	80	50.7	102	1.78	96
2008	65	38	75.3	48	54.6	36	9.33	7
2007	67	14	79.8	4	54.2	43	1.17	111
2006	63.1	79	74	72	52.1	85	2.25	84
2005	67.5	7	79.7	5	55.2	26	1.47	101
2004	64.9	40	75.5	44	54.3	41	8.25	13
2003	64.4	48	74	72	54.9	29	11.13	5
2002	66.7	17	78.3	8	55	27	3.22	60
2001	63.4	68	75.3	48	51.5	90	3.10	65
2000	62.1	96	73.1	86	51.1	98	3.88	45
1999	66	23	76.1	34	55.8	20	11.22	4
1998	65.7	24	77.5	17	53.8	46	2.33	83
1997	63.2	76	74.1	70	52.3	77	0.97	116
1996	62.9	84	71.9	104	53.8	46	7.53	16
1995	62.2	94	74.4	65	50	111	3.15	63
1994	63.7	63	74.2	67	53.2	58	5.47	26
1993	63	80	72.2	99	53.8	46	5.35	28
1992	62.5	90	72.9	91	52.2	81	2.43	76
1991	62	99	73.4	83	50.7	102	5.67	24
1990	64	57	75	52	52.9	63	2.13	87
1989	63.9	60	74.9	57	52.9	63	4.67	34
1988	62.2	94	74.7	59	49.7	113	1.88	94
1987	62.9	84	72.9	91	52.9	63	7.19	17
1986	61.8	104	72.5	95	51.1	98	0.84	117
1985	63.4	68	75.1	51	51.7	88	3.83	47
1984	59.8	119	72.5	95	47.1	121	1.20	110
1983	66.5	19	80.3	3	52.7	70	2.10	89
1982	63	80	73.7	79	52.3	77	2.41	78
1981	62.5	90	71.8	106	53.2	58	4.49	38
1980	64.9	40	77	24	52.8	67	1.40	103
1979	61.6	108	73.5	80	49.6	115	2.95	68
1978	58.6	121	71.8	106	45.4	122	2.67	72
1977	64	57	73.4	83	54.5	39	8.17	14
1976	62.4	93	74.8	58	49.9	112	2.55	74
1975	61.7	106	72.1	100	51.2	97	9.02	9
1974	63.3	75	74.1	70	52.5	73	8.57	11
1973	64.7	45	76.2	32	53.2	58	3.73	49
1972	64.3	51	76.6	28	52	86	1.84	95
1971	67.7	5	77.3	21	58	6	4.24	41
1970	65.4	30	76.2	32	54.6	36	3.20	62
1969	63.8	61	75	52	52.6	71	3.53	53
1968	64.9	40	77.6	15	52.3	77	2.88	69
1967	62.8	86	75.8	40	49.7	113	2.85	70
1966	63.4	68	74.5	64	52.3	77	6.05	23
1965	64.1	56	74.7	59	53.4	56	3.50	54
1964	63	80	75.3	48	50.7	102	1.42	102
1963	60	117	72.7	93	47.3	120	4.98	29
1962	60	117	71.6	110	48.3	118	4.63	35
1961	68.7	2	80.4	2	57	11	4.78	32
1960	62	99	73.1	86	50.9	101	8.37	12
1959	66.2	20	77.9	13	54.6	36	1.68	97
1958	61.9	102	72.4	97	51.3	95	6.49	20
1957	63.7	63	75.9	38	51.5	90	1.22	109
1956	58.3	122	69.1	121	47.5	119	4.25	40
1955	62.1	96	73	89	51.1	98	3.15	63
1954	61.5	109	71.5	111	51.4	92	6.70	19
1953	65.2	35	77.5	17	52.8	67	1.34	105
1952	64.5	47	76.3	31	52.6	71	1.58	100
1951	63.2	76	74.6	61	51.7	88	2.00	91
1950	60.3	115	70.2	117	50.3	109	1.09	114
1949	61.9	102	73	89	50.7	102	3.03	66
1948	64.6	46	77.8	14	51.4	92	0.63	121
1947	63.7	63	75	52	52.4	75	2.97	67
1946	65.7	24	77.6	15	53.8	46	2.36	82
1945	66.6	18	76.6	28	56.5	14	1.59	99
1944	65	38	75.8	40	54.3	41	8.79	10
1943	63	80	74.6	61	51.3	95	0.65	119
1942	63.7	63	74.2	67	53.2	58	3.24	59
1941	64.3	51	78.1	12	50.6	107	0.70	118
1940	61.4	111	73.5	80	49.3	116	2.37	81
1939	63.8	61	73.9	76	53.8	46	2.73	71
1938	61.7	106	71.2	113	52.2	81	14.59	1
1937	62	99	72	102	52	86	4.00	43
1936	64.2	54	72.7	93	55.7	21	3.87	46
1935	61.2	112	69.9	119	52.5	73	4.96	30
1934	66.1	21	74	72	58.1	5	9.06	8
1933	65.6	29	73.9	76	57.4	10	5.36	27
1932	64.4	48	74	72	54.8	30	3.96	44
1931	67.8	4	77.4	20	58.2	4	1.05	115
1930	67.5	7	77.3	21	57.7	8	1.31	106
1929	65.3	33	75.9	38	54.7	31	1.39	104
1928	60.5	114	68.8	122	52.2	81	4.20	42
1927	64.2	54	74.2	67	54.1	44	1.16	112
1926	61.8	104	70.8	115	52.8	67	2.45	75
1925	63.4	68	72.3	98	54.5	39	2.39	79
1924	60.6	113	71	114	50.2	110	4.63	35
1923	65.2	35	74.4	65	56	17	2.39	79
1922	65.4	30	75.4	45	55.3	24	2.06	90
1921	68.9	1	78.9	6	58.8	1	3.21	61
1920	65.7	24	75.4	45	55.9	19	7.95	15
1919	63.4	68	72.1	100	54.7	31	4.30	39
1918	60.1	116	69.5	120	50.7	102	4.89	31
1917	59.5	120	70.1	118	48.9	117	1.27	108
1916	63.4	68	73.9	76	52.9	63	3.46	55
1915	67.4	11	76.8	26	57.9	7	1.29	107
1914	63.2	76	75	52	51.4	92	0.20	122
1913	61.5	109	70.7	116	52.2	81	3.56	52
1912	63.4	68	72	102	54.7	31	2.14	86
1911	62.8	86	71.9	104	53.7	53	2.00	91
1910	63.5	67	73.1	86	53.9	45	3.41	57
1909	62.5	90	71.7	109	53.3	57	3.83	47
1908	65.4	30	75.7	42	55	27	1.12	113
1907	64.3	51	71.8	106	56.8	13	11.56	3
1906	65.7	24	76	37	55.3	24	3.57	51
1905	62.7	88	71.5	111	53.8	46	3.43	56

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1921	68.9
1961	68.7
2015	68.5
1931	67.8
1971	67.7
2017	67.6
2011	67.5
2010	67.5
2005	67.5
1930	67.5

Coldest
Year	Mean, °F
1956	58.3
1978	58.6
1917	59.5
1984	59.8
1963	60
1962	60
1918	60.1
1950	60.3
1928	60.5
1924	60.6

Wettest
Year	Precipitation, in
1938	14.59
2023	12.18
1907	11.56
1999	11.22
2003	11.13
2011	9.65
2008	9.33
1934	9.06
1975	9.02
1944	8.79

Driest
Year	Precipitation, in
1914	0.20
1948	0.63
2024	0.65
1943	0.65
1941	0.70
1986	0.84
1997	0.97
1931	1.05
1950	1.09
1908	1.12

The hottest, coldest and wettest days

Hottest day: 87°F; 10 September 2026
Coldest night: 43°F; 24 September 2026
Wettest day: 1.30 in; 1 September 2026

Every month, season and year

Months

Seasons

Years

Hartford, CT the day's answers

All-time records

Every answer in words

September 2026 brought 5.58 in of precipitation in Hartford, CT, the wettest September since 2023, 25th wettest of 122.
The hottest day of September 2026 in Hartford, CT: 87°F on Thursday 10 September 2026.
The coldest night of September 2026 in Hartford, CT: a low of 43°F on Thursday 24 September 2026.
The wettest day of September 2026 in Hartford, CT: 1.30 in on Tuesday 1 September 2026.