Marlboro County Climate
Marlboro County, South Carolina
Avg Annual Temp
63.4°F
Annual Precip
41.7"
Annual Snowfall
—
Extreme Heat Days
61.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Marlboro County Weather
Warm Temperatures and Low Rainfall
Marlboro County averages 63.4°F annually, making it much warmer than the typical U.S. county. Its precipitation of 41.7 inches is slightly higher than the national average but relatively low for a Southern county.
Exceeding the State Temperature Average
Marlboro's 63.4°F average is higher than the state mean of 62.8°F. It is one of the drier counties in the state, receiving about 7 inches less rain than the South Carolina average of 48.9 inches.
Warmer and Drier than Marion County
Marlboro County is nearly a degree warmer on average than neighboring Marion County. It also receives nearly 10 inches less rain than Marion, making it a drier alternative in the Pee Dee region.
Lengthy Summer Heat and Mild Winters
The county experiences 62 days of extreme heat each year, with July temperatures averaging a hot 81.2°F. Winters are comfortably mild, averaging 46.7°F with no significant recorded snowfall.
Managing Heat without the Humidity
Residents should prepare for 62 days of 90°F weather with sun-blocking curtains and high-efficiency fans. Because the county is drier than average, landscaping may require more supplemental watering during the hot summer 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.