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Sumter August Weather

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

Typical Sumter August Weather 1991–2020
Average daily high	88.8 °F
Average daily low	68.6 °F
Average monthly precipitation	4.9 inches
Average monthly snow	none
Daily chance of precipitation	36.8%
Daily chance of snow	0%

Sumter August Weather Records 1901–2024
Highest temperature	105 °F	August 22, 1983
Lowest temperature	50 °F	August 18, 1979
Highest daily low	83 °F	August 1, 1913
Lowest daily high	63 °F	August 17, 2013
Hottest average high temperature	95.9 °F	1954
Coldest average high temperature	83.4 °F	2012
Most daily precipitation	5.6 inches	August 5, 1946
Most monthly precipitation	12.9 inches	1961
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
August 1	90.2	69.8	105	59
August 2	90.1	69.8	104	60
August 3	90.0	69.7	101	56
August 4	89.9	69.7	102	59
August 5	89.9	69.7	103	59
August 6	89.7	69.6	102	56
August 7	89.6	69.6	100	56
August 8	89.6	69.5	100	57
August 9	89.5	69.5	101	58
August 10	89.5	69.3	103	60
August 11	89.4	69.2	104	62
August 12	89.2	69.0	99	59
August 13	89.1	68.9	98	57
August 14	89.0	68.7	100	55
August 15	88.9	68.7	102	56
August 16	88.9	68.6	102	57
August 17	88.9	68.6	104	56
August 18	88.9	68.5	99	50
August 19	88.8	68.4	100	60
August 20	88.7	68.3	100	59
August 21	88.6	68.2	102	58
August 22	88.6	68.1	105	56
August 23	88.5	67.9	104	53
August 24	88.3	67.8	102	53
August 25	88.2	67.7	101	55
August 26	88.0	67.5	100	55
August 27	87.9	67.3	103	56
August 28	87.8	67.2	101	54
August 29	87.6	67.0	102	54
August 30	87.5	66.8	99	56
August 31	87.4	66.6	98	53

Weather Station Details

Years	Station	Coordinates
1901–2024	Sumter	location