Temperature for July
In Sumter, SC during July the average high temperature is 90.2°F. The hottest day on record was July 1, 2012 when the temperature hit 105.8°F.

In Sumter, SC during July the average high temperature is 90.2°F. The hottest day on record was July 1, 2012 when the temperature hit 105.8°F.
In July the average monthly rainfall in Sumter, SC is 2.90 inches with rain usually falling on between 14 and 15 days. 1943 was the driest July with only 0.00 inches of rain falling, and 1991 was the wettest July with 12.98 inches of rain. The wettest single day in July was 30 July 1991 when 4.33 inches of rain fell.
There are thunderstorms on between 11 and 12 days in July.