Knox County Climate
Knox County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.2°F
Annual Precip
42.8"
Annual Snowfall
33.0"
Extreme Heat Days
8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,747
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Knox County
Climate Verdict
Knox County has a cool, averaging 49.2°F annually, moderately wet with 42.8 inches of annual precipitation, rare extreme heat with only 8.033333333333333 days above 90°F annually, moderate snowfall of 33.0 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 25.0°F. summers are warm — July averages 71.0°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Knox County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Knox County closely matches the Ohio statewide average temperature of 51.5°F.
Climate Profile
About Knox County Weather
A Cooler Pocket of the Midwest
Knox County is one of the cooler areas in the region, averaging just 49.2°F annually. This puts it well below the national median and results in longer, more intense winters.
One of Ohio's Coldest Counties
Knox County’s 49.2°F average is significantly colder than the Ohio state average of 51.5°F. It also records 33 inches of snow, making it one of the snowiest spots in the state's central interior.
More Snow Than Any Neighbor
With 33 inches of annual snow, Knox far exceeds the 20.1 inches found in Holmes County. It also sees only 8 extreme heat days, fewer than any other county in this group.
Mild Summers and Harsh Winters
Knox County enjoys mild summers with a 69.4°F average and very few 90°F days. However, winters are tough, featuring a 27.8°F average and nearly three feet of total snowfall.
Invest in High-Quality Winter Gear
A reliable snowblower and heavy winter insulation are mandatory for the 33 inches of annual snow. The mild summer climate means air conditioning is used less frequently than in southern Ohio.
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.