Climate change in Prince William County, Virginia
Since 1979, Prince William County, Virginia has warmed 3.8°F, with 12 more days above 90°F, 24 more nights above 70°F and 6% less precipitation a year. Its climate in 1996–2025 is most like Westmoreland County, VA's was in 1951–1980.
- Average temperature: +3.8°F
- Summer highs (Jun–Aug): +2.5°F
- Winter lows (Dec–Feb): +5.2°F
- Precipitation: −6%
- Wettest day of the year: +12%
- Longest dry spell: +2 days
- Days above 90°F: +12 days
- Nights above 70°F: +24 days
- Freezing nights: −28 days
- Frost-free season: +33 days
- Muggy days: +4 days
- Summer heat index (Jun–Aug): +3.0°F
- Extreme fire-weather days: +14 days
- Snowfall: −33%
- Snowy days (1 inch or more): −2 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.