Pennsylvania September Temperature by Year

This page is a list of the average statewide temperature in the month of September in Pennsylvania 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 Pennsylvania History?

1961 was the warmest September in Pennsylvania history. Statewide, the average daily high temperature was 78.8 °F, and the average low was 55.3 °F.

What Was the Coldest September in Pennsylvania History?

1918 was the coolest September in Pennsylvania history. Statewide, the average daily high temperature was 67.6 °F, and the average low was 46.0 °F.

Click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	35	73.8	53.4
2022	44	73.1	53.1
2021	22	74.6	53.9
2020	64	73.5	50.7
2019	10	76.9	53.4
2018	3	74.8	58.5
2017	31	75.0	52.5
2016	6	78.2	54.1
2015	4	78.0	55.1
2014	56	73.8	51.2
2013	89	73.2	48.8
2012	66	73.0	51.1
2011	19	72.7	56.0
2010	35	75.6	51.6
2009	83	71.2	51.5
2008	38	74.8	51.9
2007	19	77.0	51.7
2006	106	69.0	51.2
2005	8	78.3	52.8
2004	24	74.4	53.7
2003	73	71.2	52.2
2002	15	77.4	52.4
2001	99	72.4	48.4
2000	94	71.8	49.4
1999	47	74.1	51.6
1998	17	77.1	52.2
1997	99	71.4	49.4
1996	68	71.0	52.7
1995	99	73.0	47.8
1994	103	71.0	49.6
1993	94	70.3	50.9
1992	94	71.3	50.0
1991	90	73.3	48.5
1990	92	71.0	50.5
1989	73	72.1	51.4
1988	108	71.0	48.4
1987	73	71.5	52.0
1986	68	72.3	51.5
1985	44	75.2	51.1
1984	116	70.8	47.2
1983	58	75.5	49.3
1982	86	71.6	50.5
1981	104	69.6	50.8
1980	25	76.2	51.9
1979	85	72.5	50.0
1978	60	73.5	51.0
1977	38	72.8	53.9
1976	116	70.9	47.0
1975	124	67.5	48.3
1974	114	69.6	48.6
1973	52	74.0	51.2
1972	52	73.7	51.4
1971	10	74.1	56.1
1970	17	76.4	53.0
1969	83	72.6	50.2
1968	47	74.9	50.8
1967	119	71.6	46.0
1966	120	69.2	48.2
1965	33	74.3	53.1
1964	86	74.8	47.4
1963	124	71.3	44.5
1962	127	68.4	46.5
1961	1	78.8	55.3
1960	43	73.6	53.0
1959	13	77.6	52.3
1958	90	72.0	49.8
1957	62	74.2	50.2
1956	121	69.2	47.1
1955	80	73.3	49.6
1954	56	74.1	50.9
1953	68	75.2	48.5
1952	79	75.1	48.2
1951	86	73.8	48.4
1950	114	68.6	49.7
1949	122	69.4	46.7
1948	62	74.9	49.6
1947	46	74.4	51.4
1946	47	76.3	49.2
1945	19	74.6	54.1
1944	66	72.6	51.4
1943	108	73.5	46.2
1942	73	73.4	50.0
1941	33	78.2	49.2
1940	116	70.8	47.1
1939	38	75.8	50.9
1938	110	70.5	48.6
1937	112	71.3	47.0
1936	30	75.7	52.1
1935	111	71.2	47.9
1934	25	74.4	53.7
1933	25	74.4	53.6
1932	47	76.3	49.2
1931	2	78.4	55.1
1930	9	78.5	52.2
1929	38	75.7	51.0
1928	123	68.3	47.6
1927	52	75.5	49.6
1926	71	71.5	52.1
1925	10	76.4	53.8
1924	127	68.1	46.8
1923	58	73.5	51.4
1922	25	77.2	50.7
1921	5	77.5	55.5
1920	64	73.7	50.6
1919	60	74.5	50.1
1918	129	67.6	46.0
1917	126	69.5	45.6
1916	97	73.2	47.8
1915	23	75.9	52.4
1914	112	73.2	45.1
1913	104	72.6	47.8
1912	31	73.7	53.7
1911	47	73.4	52.2
1910	38	73.9	52.8
1909	99	72.6	48.1
1908	37	77.8	49.2
1907	52	71.9	53.4
1906	13	76.6	53.4
1905	71	73.4	50.3
1904	73	73.1	50.3
1903	80	73.2	49.7
1902	93	72.0	49.4
1901	73	72.6	50.7
1900	7	77.7	54.4
1899	107	70.8	49.1
1898	25	75.9	52.1
1897	80	75.2	47.8
1896	97	71.9	49.2
1895	16	77.0	52.5