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Sumter September Weather

Averages and records for weather in Sumter, South Carolina in the month of September.

Typical Sumter September Weather 1991–2020
Average daily high	84.0 °F
Average daily low	63.1 °F
Average monthly precipitation	4.4 inches
Average monthly snow	none
Daily chance of precipitation	29.1%
Daily chance of snow	0%

Sumter September Weather Records 1901–2024
Highest temperature	102 °F	September 6, 1954
Lowest temperature	38 °F	September 30, 1967
Highest daily low	75 °F	September 2, 2020
Lowest daily high	58 °F	September 27, 1956
Hottest average high temperature	91.8 °F	1954
Coldest average high temperature	78.9 °F	2014
Most daily precipitation	8.7 inches	September 17, 1945
Most monthly precipitation	18.0 inches	1945
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	87.3	66.4	99	54
September 2	87.1	66.2	101	52
September 3	86.9	66.0	101	52
September 4	86.7	65.8	102	52
September 5	86.5	65.5	102	50
September 6	86.3	65.2	102	50
September 7	86.1	65.0	98	53
September 8	85.8	64.9	98	50
September 9	85.7	64.7	100	48
September 10	85.5	64.5	101	45
September 11	85.3	64.3	98	47
September 12	85.0	64.1	97	48
September 13	84.7	63.9	97	49
September 14	84.5	63.7	96	45
September 15	84.2	63.4	98	45
September 16	83.9	63.1	97	47
September 17	83.5	62.7	99	50
September 18	83.3	62.2	100	50
September 19	83.0	61.9	97	46
September 20	82.7	61.5	99	46
September 21	82.5	61.2	98	43
September 22	82.3	60.9	96	45
September 23	82.0	60.6	97	44
September 24	81.7	60.3	99	42
September 25	81.3	59.9	98	40
September 26	81.0	59.6	95	42
September 27	80.7	59.4	95	46
September 28	80.4	59.1	96	45
September 29	80.0	58.8	96	45
September 30	79.8	58.5	97	38

Weather Station Details

Years	Station	Coordinates
1901–2024	Sumter	location