Climate change in Barnwell County, South Carolina
Since 1979, Barnwell County, South Carolina has warmed 2.3°F, with 6 more days above 90°F, 34 more nights above 70°F and 8% more precipitation a year. Its climate in 1996–2025 is most like Montgomery County, GA's was in 1951–1980.
- Average temperature: +2.3°F
- Summer highs (Jun–Aug): +0.1°F
- Winter lows (Dec–Feb): +4.1°F
- Precipitation: +8%
- Wettest day of the year: +41%
- Longest dry spell: +0 days
- Days above 90°F: +6 days
- Nights above 70°F: +34 days
- Freezing nights: −13 days
- Frost-free season: +19 days
- Muggy days: +18 days
- Summer heat index (Jun–Aug): +0.5°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.