McCormick County Climate
McCormick County, South Carolina
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
63.3°F
Annual Precip
47.1"
Annual Snowfall
—
Extreme Heat Days
81
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,511
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: McCormick County
Climate Verdict
McCormick County has a warm, averaging 63.3°F year-round, moderately wet with 47.1 inches of annual precipitation, significant summer heat with 80.65 days annually above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 45.0°F. summers are hot, with July averaging 81.5°F. The 37°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
McCormick County closely matches the South Carolina statewide average temperature of 62.8°F, the county experiences 17.589341085271315 more extreme heat days than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.