Sumter, SC Climate in May

Temperature for May

In Sumter, SC during May the average high temperature is 82.4°F. The hottest day on record was May 31, 1953 when the temperature hit 99.0°F.

Sumter, SC daily average and extreme temperature range for May

Low Temperature

During May the overnight temperature drops to an average of 61.7°F, with the lowest temperature of 39.0°F being recorded on May 8, 1989. In May it has never frozen overnight.

Precipitation for May

In May the average monthly rainfall in Sumter, SC is 1.87 inches with rain usually falling on between 11 and 12 days. 1943 was the driest May with only 0.00 inches of rain falling, and 1984 was the wettest May with 9.85 inches of rain. The wettest single day in May was 29 May 1984 when 2.99 inches of rain fell.

There are thunderstorms on between 5 and 6 days in May.