Average September Temperature in Washington D.C. by Year

This page contains a list of the average monthly high and low temperatures in Washington D.C. for the month of September each year between 1851 and 2023. It is based on NOAA data.

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What Was the Hottest September Ever in Washington D.C.?

1881 was the warmest September in the history of Washington D.C.. The average daily high temperature was 88.2 °F, and the average low was 68.2 °F.

What Was the Coldest September Ever in Washington D.C.?

1917 was the coolest September in the history of Washington D.C.. The average daily high temperature was 72.9 °F, and the average low was 54.8 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	21	81.6	65.1
2022	32	81.6	63.8
2021	23	81.7	64.7
2020	78	78.0	62.4
2019	3	85.7	67.3
2018	7	81.8	69.1
2017	35	80.8	64.2
2016	5	83.4	68.6
2015	11	83.5	66.2
2014	18	81.8	65.8
2013	49	80.9	61.7
2012	38	80.7	63.7
2011	50	77.6	64.9
2010	6	85.4	65.6
2009	76	77.9	62.5
2008	16	81.9	66.0
2007	27	82.3	63.5
2006	116	74.9	60.7
2005	10	84.7	65.3
2004	44	79.1	64.1
2003	66	77.8	63.1
2002	25	81.7	64.3
2001	102	77.8	60.0
2000	118	75.5	59.7
1999	84	77.7	62.3
1998	8	85.2	65.6
1997	68	79.8	61.1
1996	64	78.2	62.9
1995	58	79.9	62.0
1994	80	79.3	61.1
1993	61	79.1	62.8
1992	98	77.0	61.3
1991	54	80.0	62.0
1990	91	78.1	61.1
1989	48	79.5	63.2
1988	103	77.9	59.9
1987	39	80.1	64.0
1986	59	79.1	62.7
1985	42	81.6	62.1
1984	112	76.6	59.9
1983	33	82.2	63.0
1982	62	79.2	62.0
1981	53	79.3	62.7
1980	2	86.3	67.9
1979	45	78.4	64.7
1978	20	82.0	65.1
1977	17	81.5	66.3
1976	72	79.8	60.9
1975	109	76.0	61.0
1974	77	79.4	61.0
1973	14	83.1	65.4
1972	57	79.7	62.3
1971	26	80.5	65.5
1970	9	85.2	64.7
1969	81	79.4	60.8
1968	40	83.0	61.0
1967	114	78.6	57.3
1966	108	77.3	59.8
1965	34	81.9	63.2
1964	85	80.5	59.3
1963	136	76.6	56.3
1962	128	75.6	58.3
1961	12	83.5	66.1
1960	51	79.2	63.3
1959	24	82.1	64.2
1958	100	78.4	59.7
1957	41	79.6	64.1
1956	133	75.0	58.2
1955	87	76.9	62.8
1954	22	83.6	62.9
1953	89	79.8	59.6
1952	104	78.8	59.0
1951	74	79.5	61.1
1950	129	74.1	59.7
1949	126	76.1	58.1
1948	93	78.8	60.0
1947	88	77.7	61.8
1946	70	79.6	61.1
1945	29	80.6	65.0
1944	65	78.4	62.6
1943	119	77.6	57.6
1942	67	79.7	61.2
1941	31	83.0	62.5
1940	131	76.3	57.4
1939	56	80.3	61.7
1938	124	74.8	59.9
1937	142	75.4	56.4
1936	46	80.3	62.7
1935	127	75.9	58.1
1934	63	78.1	63.1
1933	43	80.3	63.3
1932	75	80.2	60.4
1931	15	84.1	64.1
1930	4	87.0	65.1
1929	79	80.6	59.7
1928	147	72.9	56.9
1927	82	80.3	59.9
1926	101	77.1	60.9
1925	30	82.1	63.5
1924	152	73.2	55.4
1923	90	78.4	60.9
1922	86	79.7	60.1
1921	13	84.0	64.7
1920	106	78.1	59.4
1919	94	79.5	59.3
1918	151	74.8	53.7
1917	153	72.9	54.8
1916	135	77.7	55.4
1915	60	81.3	60.6
1914	140	77.0	54.9
1913	121	76.8	58.1
1912	69	79.0	61.8
1911	71	79.6	61.1
1910	52	80.4	61.7
1909	137	76.1	56.7
1908	132	77.0	56.3
1907	95	78.3	60.5
1906	28	82.6	63.2
1905	113	78.0	58.4
1904	122	77.2	57.6
1903	125	77.4	56.9
1902	130	76.3	57.4
1901	123	77.4	57.3
1900	19	83.1	64.2
1899	141	76.4	55.4
1898	55	81.4	60.6
1897	111	79.7	56.9
1896	115	78.1	57.6
1895	36	83.0	61.9
1894	47	80.0	62.9
1893	139	74.8	57.2
1892	138	76.2	56.0
1891	73	79.8	60.8
1890	117	76.1	59.3
1889	143	73.4	57.9
1888	148	72.0	57.4
1887	144	74.3	56.8
1886	97	78.5	60.1
1885	134	76.1	57.1
1884	37	83.3	61.5
1883	145	74.7	56.2
1882	92	77.8	61.2
1881	1	88.2	68.2
1880	107	78.0	59.2
1879	150	74.3	54.8
1878	99	77.4	60.8
1877	120	75.4	59.7
1876	146	72.4	58.4
1875	149	74.2	55.0
1874	83	79.1	61.1
1873	110	77.6	59.0
1872	96	79.3	59.3
1851	105	77.6	60.0

Weather Station Details

Years	Station	Coordinates
1945–2024	Washington Reagan Airport	location
1851–1945	Washington D.C.	location