Horry County Climate
Horry County, South Carolina
Avg Annual Temp
63.6°F
Annual Precip
52.4"
Annual Snowfall
—
Extreme Heat Days
33.56666666666667
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Horry County Weather
Warmer and Wetter than the National Average
Horry County maintains an average annual temperature of 63.6°F, significantly exceeding the national median of approximately 55°F. This humid subtropical climate receives 52.4 inches of rain annually, which is nearly 14 inches more than the typical U.S. county.
Beating the South Carolina Temperature Average
The county's 63.6°F annual average sits nearly a full degree higher than the South Carolina state average of 62.8°F. This coastal warmth is driven by mild winters where the average temperature remains a comfortable 47.7°F.
A Damp Exception Among Coastal Neighbors
While neighboring Marion County averages 51.3 inches of rain, Horry County sees even higher totals at 52.4 inches. Its 34 extreme heat days per year make it much cooler during the summer than inland neighbors like Marion, which sees 55 such days.
Mild Winters and Manageable Summer Heat
Summer averages hover around 79.1°F, with 34 days reaching 90°F or higher. While snowfall data is limited for the coast, the January average of 45.8°F ensures that freezing weather is a rare occurrence.
Planning for High Humidity and Rain
With 52.4 inches of annual precipitation, residents should prioritize advanced drainage systems and mold-resistant building materials. High-efficiency HVAC systems are essential here to manage the consistent coastal humidity rather than extreme temperature spikes.
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.