Climate change in Marion County, South Carolina
Since 1979, Marion County, South Carolina has warmed 2.7°F, with 13 more days above 90°F, 33 more nights above 70°F and 7% more precipitation a year. Its climate in 1996–2025 is most like Berkeley County, SC's was in 1951–1980.
- Average temperature: +2.7°F
- Summer highs (Jun–Aug): +0.7°F
- Winter lows (Dec–Feb): +4.3°F
- Precipitation: +7%
- Wettest day of the year: +26%
- Longest dry spell: +1 days
- Days above 90°F: +13 days
- Nights above 70°F: +33 days
- Freezing nights: −17 days
- Frost-free season: +28 days
- Muggy days: +13 days
- Summer heat index (Jun–Aug): +2.2°F
- Extreme fire-weather days: −9 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.