Climate change in Greenville County, South Carolina
Since 1979, Greenville County, South Carolina has warmed 2.5°F, with 5 more days above 90°F, 14 more nights above 70°F and 1% less precipitation a year. Its climate in 1996–2025 is most like Clayton County, GA's was in 1951–1980.
- Average temperature: +2.5°F
- Summer highs (Jun–Aug): +0.8°F
- Winter lows (Dec–Feb): +3.8°F
- Precipitation: −1%
- Wettest day of the year: +19%
- Longest dry spell: +1 days
- Days above 90°F: +5 days
- Nights above 70°F: +14 days
- Freezing nights: −12 days
- Frost-free season: +28 days
- Muggy days: +9 days
- Summer heat index (Jun–Aug): +1.2°F
- Extreme fire-weather days: +4 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.