Prince William County Climate
Prince William County, Virginia
Avg Annual Temp
55.5°F
Annual Precip
—
Annual Snowfall
—
Extreme Heat Days
40.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Precipitation data coming soon
Seasonal Overview
National Comparison
Warmer than 55% of US counties
Data pending
More seasonal variation than 57% of US counties
Frequently Asked Questions
What is the average temperature in Prince William County?
The average annual temperature in Prince William County, VA is 55.5°F, based on NOAA 30-year climate normals (1991-2020).
How hot does Prince William County get in summer?
The average summer temperature (June-August) in Prince William County is 75.8°F. The county experiences an average of 40.5 days per year above 90°F.
How cold are winters in Prince William County?
The average winter temperature (December-February) in Prince William County is 35.5°F. January, typically the coldest month, averages 33.3°F.
Track your own weather in Prince William County
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.