Allen County Climate
Allen County, Ohio
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.2°F
Annual Precip
38.5"
Annual Snowfall
18.5"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,215
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Allen County
Climate Verdict
Allen County has a mild, with an average annual temperature of 51.2°F, moderate rainfall of 38.5 inches per year, rare extreme heat with only 13.3 days above 90°F annually, light snow averaging 18.5 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.6°F. summers are warm — July averages 73.4°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Allen County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Allen County closely matches the Ohio statewide average temperature of 51.5°F, it is somewhat drier than average for Ohio.
Climate Profile
About Allen County Weather
Standard Midwestern Climate Trends
Allen County maintains an average annual temperature of 51.2°F, placing it just below the national median for temperate zones. The area experiences a classic four-season humid continental climate.
Mirroring the Ohio Average
At 51.2°F, Allen County sits remarkably close to the Ohio state average of 51.5°F. It represents the typical thermal experience for residents in the western part of the state.
Drier Than the Southern Border
The county records 38.5 inches of annual precipitation, which is drier than the 41.2-inch state average. It receives less snow (18.5 inches) than its neighbors closer to the Lake Erie snowbelt.
Hot Summers and Brisk Winters
Summers reach an average of 71.8°F, including 13 days where temperatures climb above 90°F. Winters drop to a 29.3°F average, accompanied by 18.5 inches of snow.
Balance Cooling and Heating Needs
Homeowners should service their AC units early to handle the 13 extreme heat days each year. Reliable insulation is equally important for the 26.6°F January average.
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.