King William County Climate
King William County, Virginia
Avg Annual Temp
59.1°F
Annual Precip
47.9"
Annual Snowfall
9.6"
Extreme Heat Days
50
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About King William County Weather
A Warmer-than-Average Mid-Atlantic Climate
King William County averages 59.1°F annually, which is notably higher than the national median. It also receives a healthy 47.9 inches of precipitation.
Warmer and Wetter Than the State Average
The county is 3.2 degrees warmer than the Virginia average of 55.9°F. It also receives about 2.2 inches more rain annually than the state as a whole.
Warmer Than Henrico and Hanover
King William is nearly a full degree warmer than Henrico County and over a degree warmer than Hanover. It shares a similar high-heat profile with Hopewell.
Fifty Days of Extreme Summer Heat
Summer is intense with 50 days reaching 90°F or higher and a July average of 79.2°F. Winters are mild, averaging 9.6 inches of snow.
Manage High Humidity and Summer Peaks
Residents should budget for high cooling costs to handle the 50 days of extreme heat. Rain-ready gear is also essential given the 47.9 inches of annual precipitation.
Frequently Asked Questions
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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.