Clarendon County Climate
Clarendon County, South Carolina
Avg Annual Temp
63.1°F
Annual Precip
55.7"
Annual Snowfall
0.5"
Extreme Heat Days
74.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.