Williams County Climate
Williams County, Ohio
Avg Annual Temp
49.4°F
Annual Precip
37.1"
Annual Snowfall
30.9"
Extreme Heat Days
17.55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Williams County Weather
A Classic Northern Continental Climate
Williams County averages 49.4°F annually, placing it below the national median for continental climates. Its 37.1 inches of annual precipitation is typical for the Great Lakes region.
One of Ohio's Cooler Corners
The county's 49.4°F average temperature sits 2.1 degrees below the Ohio state average of 51.5°F. It ranks as one of the cooler northwestern regions in the state.
Snowier than its Eastern Neighbors
With 30.9 inches of annual snow, Williams is significantly snowier than Wood County to the east. It also experiences slightly cooler winters than its neighbors toward the state center.
Crisp Winters and Hot Summer Spikes
Winters average a cold 26.9°F, while summers reach a 71.1°F average. Despite the northern location, residents still face 18 days per year with temperatures hitting 90°F or higher.
Prepare for Snow and Summer Humidity
Heavy-duty snow removal equipment is essential to manage the 30.9 inches of annual snowfall. Residents should also service HVAC systems early to handle the 18 days of extreme summer heat.
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.