Allendale County Climate
Allendale County, South Carolina
Avg Annual Temp
63.4°F
Annual Precip
48.8"
Annual Snowfall
—
Extreme Heat Days
74.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Allendale County Weather
Well above the national temperature median
With an annual average of 63.4°F, Allendale is significantly warmer than the U.S. median. This humid subtropical region sees 48.8 inches of precipitation, matching the state average.
Slightly warmer than the state norm
Allendale’s 63.4°F average places it above the South Carolina state average of 62.8°F. It sits firmly in the warmer half of the state's 46 counties.
Consistent warmth in the southern interior
It is slightly cooler than neighboring Bamberg at 64.4°F but warmer than the state average. This consistency reflects the stable, warm climate of the southern coastal plain.
Heat dominates the local calendar
Summer averages reach 78.9°F, and the county endures 75 days of extreme heat over 90°F. While snowfall data is unavailable for this region, winter remains mild with a 47.5°F average.
Prepare for 75 days of extreme heat
The high frequency of 90-degree days requires reliable air conditioning and heat-safety awareness for outdoor workers. Gardeners can take advantage of the mild 47.5°F winters for extended growing seasons.
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.