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Sumter, SC Weather


Sumter, SC climate is warm during summer when temperatures tend to be in the 70's and cold during winter when temperatures tend to be in the 40's.

The warmest month of the year is July with an average maximum temperature of 91.80 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 33.60 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 22 degrees Fahrenheit, and moderate during winter with an average difference of 24 degrees Fahrenheit.

The annual average precipitation at Sumter is 48.65 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is July with an average rainfall of 5.48 Inches.

Weather Data

Normal Climate

Normal Temperatures

(SUMTER Weather station, 0.82 miles from Sumter)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 56.2 60.6 68.5 76.5 83.3 88.9 91.8 90.1 85.2 76.1 67.7 58.9 75.3
Mean °F 44.9 48.2 55.4 62.9 70.4 77.0 80.7 79.0 73.9 63.3 54.9 47.3 63.2
Min °F 33.6 35.7 42.3 49.2 57.5 65.1 69.5 67.9 62.6 50.4 42.0 35.6 51.0

Normal Precipitation

(SUMTER Weather station, 0.82 miles from Sumter)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 4.70 3.59 4.37 2.94 3.47 5.42 5.48 5.04 4.17 3.06 2.86 3.55 48.65