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Pittsburgh September Weather

Averages and records for weather in Pittsburgh, Pennsylvania in the month of September.

Typical Pittsburgh September Weather 1991–2020
Average daily high	75.3 °F
Average daily low	55.0 °F
Average monthly precipitation	3.3 inches
Average monthly snow	none
Daily chance of precipitation	32.7%
Daily chance of snow	0%

Pittsburgh September Weather Records 1926–2024
Highest temperature	97 °F	September 5, 1954
Lowest temperature	31 °F	September 19, 1959
Highest daily low	75 °F	September 22, 1931
Lowest daily high	49 °F	September 24, 1950
Hottest average high temperature	81.9 °F	1959
Coldest average high temperature	67.1 °F	1975
Most daily precipitation	6.0 inches	September 17, 2004
Most monthly precipitation	10.1 inches	2004
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	79.7	59.5	97	45
September 2	79.5	59.2	94	45
September 3	79.2	59.0	96	44
September 4	79.0	58.7	95	42
September 5	78.8	58.5	97	43
September 6	78.5	58.2	95	39
September 7	78.4	58.0	94	41
September 8	78.1	57.7	96	37
September 9	77.8	57.4	95	41
September 10	77.4	57.0	94	40
September 11	77.1	56.6	93	41
September 12	76.8	56.2	95	42
September 13	76.4	56.0	96	40
September 14	76.1	55.7	90	36
September 15	75.6	55.2	91	41
September 16	75.2	54.8	95	37
September 17	74.8	54.4	91	33
September 18	74.4	54.0	89	35
September 19	74.0	53.7	89	31
September 20	73.6	53.4	90	35
September 21	73.2	53.1	90	34
September 22	72.8	52.7	89	37
September 23	72.4	52.3	89	33
September 24	72.1	51.8	90	33
September 25	71.8	51.4	89	35
September 26	71.5	51.2	89	35
September 27	71.1	50.8	91	34
September 28	70.7	50.4	90	34
September 29	70.3	50.0	89	33
September 30	70.0	49.6	91	36

Weather Station Details

Years	Station	Coordinates
1948–2024	Pittsburgh International Airport	location
1926–1947	Pittsburgh	location