Aiken County Climate
Aiken County, South Carolina
Avg Annual Temp
64.1°F
Annual Precip
50.8"
Annual Snowfall
0.7"
Extreme Heat Days
86.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Aiken County Weather
High heat in a subtropical climate
Aiken's 64.1°F average temperature sits well above the national median, marking it as a warm humid subtropical zone. The area receives 50.8 inches of rain, exceeding the state average of 48.9 inches.
Warmer than the South Carolina average
Aiken is notably warmer than the state norm, recording a 64.1°F annual average compared to 62.8°F statewide. It represents one of the hotter inland counties in South Carolina.
Warmer than its northern Piedmont neighbors
Aiken is significantly warmer than Abbeville at 62.1°F. It shares a nearly identical thermal profile with neighboring Barnwell, which averages 64.3°F annually.
Eighty-six days of extreme summer heat
Residents face 86 extreme heat days annually as July temperatures average 82.3°F. Winters are brief and mild, averaging 47.2°F with less than an inch of annual snowfall.
Plan for extended heat and humidity
Heavy-duty cooling systems are essential to handle nearly three months of temperatures over 90°F. Outdoor activities are best planned for early morning to avoid the intense afternoon peaks.
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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.