Climate change in DeKalb County, Georgia
Since 1979, DeKalb County, Georgia has warmed 3.4°F, with 18 more days above 90°F, 23 more nights above 70°F and 4% more precipitation a year. Its climate in 1996–2025 is most like McCormick County, SC's was in 1951–1980.
- Average temperature: +3.4°F
- Summer highs (Jun–Aug): +1.8°F
- Winter lows (Dec–Feb): +4.8°F
- Precipitation: +4%
- Wettest day of the year: +33%
- Longest dry spell: +3 days
- Days above 90°F: +18 days
- Nights above 70°F: +23 days
- Freezing nights: −20 days
- Frost-free season: +30 days
- Muggy days: +8 days
- Summer heat index (Jun–Aug): +2.0°F
- Extreme fire-weather days: +16 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.