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Chambersburg September Weather

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

Typical Chambersburg September Weather 1991–2020
Average daily high	76.4 °F
Average daily low	55.7 °F
Average monthly precipitation	4.0 inches
Average monthly snow	none
Daily chance of precipitation	29.4%
Daily chance of snow	0%

Chambersburg September Weather Records 1894–2024
Highest temperature	101 °F	September 8, 1939
Lowest temperature	28 °F	September 24, 1963
Highest daily low	76 °F	September 4, 2012
Lowest daily high	46 °F	September 28, 1984
Hottest average high temperature	84.9 °F	1931
Coldest average high temperature	70.4 °F	1975
Most daily precipitation	4.6 inches	September 1, 1952
Most monthly precipitation	10.0 inches	1975
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	80.8	60.2	101	40
September 2	80.5	59.9	100	43
September 3	80.3	59.6	100	40
September 4	80.1	59.3	96	43
September 5	79.8	59.1	95	42
September 6	79.6	58.8	98	40
September 7	79.4	58.5	95	36
September 8	79.2	58.3	101	41
September 9	78.8	58.0	96	38
September 10	78.5	57.7	99	36
September 11	78.1	57.3	100	32
September 12	77.8	57.0	99	35
September 13	77.5	56.7	96	36
September 14	77.2	56.5	96	34
September 15	76.7	56.0	95	37
September 16	76.3	55.6	94	30
September 17	75.9	55.2	91	33
September 18	75.5	54.9	90	34
September 19	75.2	54.5	93	34
September 20	74.8	54.2	91	35
September 21	74.5	53.9	96	30
September 22	74.1	53.5	97	32
September 23	73.7	53.1	95	31
September 24	73.4	52.7	94	28
September 25	73.1	52.3	92	30
September 26	72.8	52.1	91	30
September 27	72.5	51.8	89	29
September 28	72.1	51.4	89	29
September 29	71.6	51.0	91	31
September 30	71.2	50.6	92	32

Weather Station Details

Years	Station	Coordinates
1894–2024	Chambersburg 1 ESE	location