Clarendon County Climate
Clarendon County, South Carolina
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
63.1°F
Annual Precip
55.7"
Annual Snowfall
0.5"
Extreme Heat Days
75
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,464
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Clarendon County
Climate Verdict
Clarendon County has a warm, averaging 63.1°F year-round, very wet conditions receiving 55.7 inches of precipitation annually, significant summer heat with 74.7 days annually above 90°F, light snow averaging 0.5 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 45.2°F. summers are hot, with July averaging 80.6°F. The 35°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
Clarendon County closely matches the South Carolina statewide average temperature of 62.8°F, it is also noticeably wetter, receiving 6.8 inches more precipitation than the state average.
Climate Profile
About Clarendon County Weather
High Heat and Heavy Rainfall
Clarendon County averages 63.1°F annually, placing it among the warmer regions in the United States. Its 55.7 inches of annual precipitation is exceptionally high compared to the national average. This creates a lush but very humid environment.
One of the State's Wettest Counties
At 55.7 inches of rain, Clarendon far exceeds the South Carolina average of 48.9 inches. Its 63.1°F average temperature also tracks higher than the 62.8°F state norm. This county is a hotspot for both moisture and heat in the Sandhills.
Wetter and Hotter Than Neighbors
Clarendon receives nearly 7 inches more rain annually than neighboring Dillon County. It also faces 75 extreme heat days, significantly more than the 54 days seen in nearby Colleton. This makes it one of the most weather-intense counties in the region.
Extremely Hot Summers and Damp Winters
July averages 80.6°F, but the real story is the 75 days of extreme heat each year. Winter is mild and wet, with a 46.9°F average and only 0.5 inches of snow. Rainfall is frequent across all four seasons.
Invest in Drainage and Cooling
Given the 55.7 inches of annual rain, high-quality gutters and site drainage are essential. Residents must prepare for a grueling summer season that includes 75 days of temperatures above 90°F. Humidity control is the primary challenge for home maintenance here.
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.