Climate change in Nassau County, New York
Since 1979, Nassau County, New York has warmed 3.3°F, with 7 more days above 90°F, 20 more nights above 70°F and 6% less precipitation a year. Its climate in 1996–2025 is most like Kings County, NY's was in 1951–1980.
- Average temperature: +3.3°F
- Summer highs (Jun–Aug): +2.7°F
- Winter lows (Dec–Feb): +4.5°F
- Precipitation: −6%
- Wettest day of the year: +5%
- Longest dry spell: +2 days
- Days above 90°F: +7 days
- Nights above 70°F: +20 days
- Freezing nights: −19 days
- Frost-free season: +5 days
- Muggy days: +13 days
- Summer heat index (Jun–Aug): +3.6°F
- Extreme fire-weather days: +14 days
- Snowfall: +27%
- Snowy days (1 inch or more): +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.