Climate change in Union County, New Jersey
Since 1979, Union County, New Jersey has warmed 3.7°F, with 10 more days above 90°F, 21 more nights above 70°F and 3% more precipitation a year. Its climate in 1996–2025 is most like Kent County, MD's was in 1951–1980.
- Average temperature: +3.7°F
- Summer highs (Jun–Aug): +2.5°F
- Winter lows (Dec–Feb): +5.9°F
- Precipitation: +3%
- Wettest day of the year: +28%
- Longest dry spell: +2 days
- Days above 90°F: +10 days
- Nights above 70°F: +21 days
- Freezing nights: −29 days
- Frost-free season: +22 days
- Muggy days: +8 days
- Summer heat index (Jun–Aug): +3.3°F
- Extreme fire-weather days: +14 days
- Snowfall: +6%
- 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.