Williams County Climate
Williams County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.4°F
Annual Precip
37.1"
Annual Snowfall
30.9"
Extreme Heat Days
18
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,945
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Williams County
Climate Verdict
Williams County has a cool, averaging 49.4°F annually, moderate rainfall of 37.1 inches per year, rare extreme heat with only 17.55 days above 90°F annually, moderate snowfall of 30.9 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.2°F. summers are warm — July averages 73.0°F. The 49°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Williams County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Williams County closely matches the Ohio statewide average temperature of 51.5°F, it is somewhat drier than average for Ohio.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.