Colleton County Climate
Colleton County, South Carolina
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
64.8°F
Annual Precip
51.4"
Annual Snowfall
0.0"
Extreme Heat Days
54
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,824
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Colleton County
Climate Verdict
Colleton County has a warm, averaging 64.8°F year-round, moderately wet with 51.4 inches of annual precipitation, occasional hot days — 54.199999999999996 per year above 90°F, virtually no measurable snowfall. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 47.5°F. summers are hot, with July averaging 81.2°F. The 34°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Colleton County closely matches the South Carolina statewide average temperature of 62.8°F, it is somewhat wetter than average for South Carolina.
Climate Profile
About Colleton County Weather
A Warm Subtropical Coastal Basin
Colleton County's annual average temperature of 64.8°F is significantly warmer than the national median. Its location near the coast provides a consistent maritime influence. The county avoids the sharp cold fronts that affect more inland states.
Warmer Than the State Median
The average temperature of 64.8°F is two degrees higher than the South Carolina state average of 62.8°F. Rainfall is also heavy, with 51.4 inches annually compared to the state's 48.9. This makes Colleton one of the warmer and wetter counties in the Lowcountry.
Milder Than Coastal Charleston
Colleton is slightly cooler than Charleston County's 66.1°F, providing a marginally more temperate experience. Both counties see high rainfall over 51 inches, outpacing inland neighbors. It shares the same humid characteristics as its famous coastal neighbor.
Snow-Free Winters and Steamy Summers
Colleton sees zero inches of snow on average, making it one of the few truly snow-free zones. July averages 81.2°F, and residents face 54 extreme heat days per year. Winter is very comfortable with a 49.4°F average.
Ditch the Shovels for Rain Boots
With 0.0 inches of snow but 51.4 inches of rain, residents should focus on flood prep rather than winter weather. The 54 extreme heat days require efficient cooling systems and shade structures. Summer gear should prioritize moisture-wicking fabrics.
Frequently Asked Questions
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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.