Sumter County Climate
Sumter County, Georgia
Avg Annual Temp
64.3°F
Annual Precip
52.0"
Annual Snowfall
0.2"
Extreme Heat Days
66.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Sumter County Weather
Consistently Warm Subtropical Environment
Sumter County averages 64.3°F annually, placing it well above the national average for temperature. This climate supports a long growing season but brings significant summer humidity.
A Typical South Georgia Climate Profile
At 64.3°F, Sumter is slightly warmer than the Georgia average of 63.7°F. Its annual precipitation of 52.0 inches is almost perfectly aligned with the state average of 51.4 inches.
Warmer and Wetter Than Spalding
Sumter is notably warmer than Spalding County to the north, which averages only 62.8°F. It also experiences 66 extreme heat days, compared to Spalding's 39.
Hot July and Rare Winter Dustings
July temperatures average 80.5°F, contributing to 66 days per year of 90-degree heat. While snow is rare, the county averages about 0.2 inches per year, usually in brief, non-accumulating events.
Monitor Humidity and Storm Potential
The combination of 52 inches of rain and 80-degree summer averages creates high humidity levels. Residents should ensure homes are well-insulated to keep cooling costs manageable during the long summer.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.