Williamsburg County Climate
Williamsburg County, South Carolina
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
63.9°F
Annual Precip
52.5"
Annual Snowfall
1.6"
Extreme Heat Days
82
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,688
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Williamsburg County
Climate Verdict
Williamsburg County has a warm, averaging 63.9°F year-round, moderately wet with 52.5 inches of annual precipitation, significant summer heat with 82.05 days annually above 90°F, light snow averaging 1.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 46.0°F. summers are hot, with July averaging 81.3°F. The 35°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Williamsburg County closely matches the South Carolina statewide average temperature of 62.8°F, it is somewhat wetter than average for South Carolina, the county experiences 18.989341085271306 more extreme heat days than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.