Williamsburg County Climate
Williamsburg County, South Carolina
Avg Annual Temp
64.0°F
Annual Precip
52.5"
Annual Snowfall
1.6"
Extreme Heat Days
82.05
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Williamsburg County Weather
Significantly hotter than national norms
Williamsburg County is much warmer than the national median with an annual average temperature of 63.9°F. This coastal plain climate is defined by long, humid summers and very mild winters.
Exceeding South Carolina’s heat and rain averages
The county is warmer than the state average of 62.8°F and receives a substantial 52.5 inches of annual rain. This makes it one of the wetter and warmer regions in the entire state.
Hotter and wetter than the Upstate
Williamsburg experiences 82 days of extreme heat, far outpacing northern neighbors like York and Union. Its 52.5 inches of precipitation also dwarfs the rainfall totals found in the state's interior counties.
A dominant and humid summer
Summer is the primary season here, featuring an 80.0°F average and nearly three months of days exceeding 90°F. Winters are exceptionally mild with a 47.7°F average and a negligible 1.6 inches of snow.
Plan for moisture and high heat
Residents should invest in high-efficiency cooling and moisture control to handle the 82 days of extreme heat and high rainfall. Outdoor activities are best reserved for the morning to avoid the peak humidity and sun.
Frequently Asked Questions
What is the average temperature in Williamsburg County?
How much rain does Williamsburg County get?
Does it snow in Williamsburg County?
How hot does Williamsburg County get in summer?
How cold are winters in Williamsburg County?
Track your own weather in Williamsburg County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.