McCormick County Climate
McCormick County, South Carolina
Avg Annual Temp
63.3°F
Annual Precip
47.1"
Annual Snowfall
—
Extreme Heat Days
80.65
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About McCormick County Weather
Extreme Southern Heat and High Humidity
McCormick County is significantly warmer than the national median with an annual average of 63.3°F. It receives 47.1 inches of precipitation annually, which is typical for a humid subtropical climate.
The Epicenter of South Carolina Heat
McCormick is warmer than the state average of 62.8°F, but its most striking feature is the heat frequency. The county endures 81 days of extreme heat annually, far more than many of its state counterparts.
Outpacing Laurens in Summer Extremes
While neighboring Laurens County sees 63 days of 90°F heat, McCormick faces a staggering 81 days. McCormick is also 2 degrees warmer on average than Laurens, which sits at 61.2°F.
Brutal Summers and Very Mild Winters
July averages 81.5°F, part of a summer season where temperatures hit 90°F or higher 81 times a year. Winter remains mild with an average of 46.4°F and no recorded annual snowfall data.
Prioritizing Extreme Heat Safety
With 81 days of extreme heat, a reliable and well-maintained HVAC system is a health requirement in McCormick. Residents should plan outdoor activities for the early morning to avoid the prolonged afternoon heat that lasts nearly three months.
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.