Darlington County Climate
Darlington County, South Carolina
Avg Annual Temp
63.1°F
Annual Precip
48.2"
Annual Snowfall
0.3"
Extreme Heat Days
73.43333333333334
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Darlington County Weather
Consistently Warm and Sunny
Darlington County averages 63.1°F annually, making it much warmer than the average US county. It features a humid subtropical climate with long, intense summers. The weather patterns are influenced by its inland position in the Coastal Plain.
Slightly Warmer Than the State Norm
Darlington's 63.1°F annual average is slightly higher than the South Carolina average of 62.8°F. Precipitation is near the state norm at 48.2 inches compared to the 48.9-inch average. It represents the classic, heat-driven weather of the state's interior.
Punched by More Extreme Heat
Darlington experiences 73 extreme heat days, far more than the 63 days seen in neighboring Dillon or Chesterfield. Its average temperature is identical to Clarendon's 63.1°F. However, it is slightly drier than Clarendon by about 7 inches of rain.
A Long Season of Extreme Heat
Summer is dominated by 73 days of temperatures over 90°F, with July averaging 81.7°F. Winter is mild at 46.2°F, though it occasionally sees a dusting of snow averaging 0.3 inches. The climate is defined by the sheer volume of hot days.
Max Out the Cooling System
With 73 days of extreme heat, a high-efficiency HVAC system is the most important home investment. Outdoor workers and residents should plan for intense July peaks of 81.7°F. Winter needs are minimal, as snow is virtually non-existent at 0.3 inches.
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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.