Climate change in Nassau County, Florida
Since 1979, Nassau County, Florida has warmed 2.9°F, with 18 more days above 90°F, 40 more nights above 70°F and 1% less precipitation a year. Its climate in 1996–2025 is most like Putnam County, FL's was in 1951–1980.
- Average temperature: +2.9°F
- Summer highs (Jun–Aug): +1.1°F
- Winter lows (Dec–Feb): +4.6°F
- Precipitation: −1%
- Wettest day of the year: +41%
- Longest dry spell: +8 days
- Days above 90°F: +18 days
- Nights above 70°F: +40 days
- Freezing nights: −12 days
- Frost-free season: +34 days
- Muggy days: +20 days
- Summer heat index (Jun–Aug): +2.4°F
- Extreme fire-weather days: +1 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.