Connecticut September Temperature by Year

This page is a list of the average statewide temperature in the month of September in Connecticut for each year from 1895–2023. It is a statewide average over the entire territory of the state, based on data from the NOAA.

State:

Month:

What Was the Hottest September in Connecticut History?

2015 was the warmest September in Connecticut history. Statewide, the average daily high temperature was 79.7 °F, and the average low was 55.8 °F.

What Was the Coldest September in Connecticut History?

1917 was the coolest September in Connecticut history. Statewide, the average daily high temperature was 69.2 °F, and the average low was 45.4 °F.

Click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	10	74.5	56.1
2022	29	73.5	53.5
2021	11	74.5	55.9
2020	29	74.4	52.5
2019	37	74.3	52.0
2018	5	74.1	58.1
2017	6	76.2	55.8
2016	4	76.7	55.7
2015	1	79.7	55.8
2014	26	74.6	52.7
2013	73	72.5	50.3
2012	34	73.4	53.1
2011	3	75.4	57.3
2010	8	76.2	55.1
2009	86	71.8	50.2
2008	34	73.2	53.4
2007	18	76.8	52.5
2006	76	71.4	50.9
2005	6	77.9	54.1
2004	24	73.9	53.6
2003	34	72.7	53.9
2002	16	75.5	54.1
2001	50	74.0	51.0
2000	76	72.1	50.2
1999	18	74.6	54.5
1998	22	75.6	52.9
1997	70	72.3	50.9
1996	54	71.4	53.2
1995	100	72.0	49.0
1994	72	71.5	51.5
1993	64	71.2	52.4
1992	76	71.2	51.2
1991	90	71.8	49.8
1990	75	72.4	50.1
1989	54	72.9	51.7
1988	101	72.3	48.5
1987	76	70.7	51.8
1986	103	70.1	50.3
1985	45	73.3	52.0
1984	118	70.6	47.1
1983	21	77.3	51.6
1982	68	72.2	51.1
1981	96	70.6	50.6
1980	31	75.1	51.7
1979	76	72.4	50.0
1978	118	70.3	47.3
1977	64	70.9	52.6
1976	108	71.0	48.7
1975	122	68.1	49.0
1974	94	70.7	50.8
1973	64	73.4	50.2
1972	45	73.5	51.8
1971	13	74.0	56.0
1970	45	73.1	52.1
1969	58	72.9	51.4
1968	40	75.1	51.0
1967	96	72.3	48.8
1966	108	70.5	49.1
1965	58	72.2	51.9
1964	86	72.8	49.2
1963	127	69.5	46.4
1962	121	69.6	47.6
1961	2	78.6	56.8
1960	83	71.4	50.9
1959	15	76.5	53.3
1958	90	71.4	50.3
1957	56	73.7	50.7
1956	125	68.5	47.8
1955	90	71.8	49.7
1954	107	69.4	50.3
1953	43	75.1	50.6
1952	56	73.6	50.8
1951	83	72.5	49.8
1950	124	68.3	48.3
1949	108	70.8	48.8
1948	44	75.8	49.6
1947	63	73.2	50.5
1946	31	75.0	51.7
1945	18	74.7	54.6
1944	37	73.9	52.6
1943	76	73.0	49.4
1942	64	72.8	50.8
1941	45	76.3	48.8
1940	111	71.6	47.9
1939	86	72.5	49.6
1938	120	69.6	47.8
1937	114	71.2	48.1
1936	61	71.8	52.1
1935	117	69.4	48.6
1934	25	72.5	54.9
1933	42	72.3	53.5
1932	61	73.4	50.6
1931	12	75.9	54.2
1930	13	76.2	53.8
1929	40	75.1	50.9
1928	123	68.2	48.7
1927	76	72.7	49.8
1926	111	70.1	49.3
1925	68	71.8	51.6
1924	125	69.7	46.5
1923	50	73.3	51.7
1922	53	74.0	50.8
1921	9	76.9	54.1
1920	45	73.5	51.8
1919	86	71.2	50.8
1918	128	68.4	46.8
1917	129	69.2	45.4
1916	73	73.0	49.9
1915	23	75.2	53.0
1914	83	74.4	47.7
1913	116	70.2	48.1
1912	96	70.6	50.6
1911	96	71.3	49.9
1910	70	72.7	50.5
1909	101	71.2	49.6
1908	39	74.6	51.6
1907	50	71.7	53.3
1906	26	75.1	52.0
1905	103	70.2	50.1
1904	106	70.8	49.3
1903	94	72.0	49.4
1902	90	70.8	50.9
1901	58	73.0	51.3
1900	17	76.3	53.0
1899	115	69.9	48.5
1898	26	74.7	52.4
1897	105	71.3	48.9
1896	111	69.8	49.6
1895	31	75.6	51.2