Jay County Climate
Jay County, Indiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.3°F
Annual Precip
39.9"
Annual Snowfall
19.4"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,064
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Jay County
Climate Verdict
Jay County has a mild, with an average annual temperature of 50.3°F, moderate rainfall of 39.9 inches per year, rare extreme heat with only 13.2 days above 90°F annually, light snow averaging 19.4 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 25.4°F. summers are warm — July averages 72.8°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Jay County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Jay County closely matches the Indiana statewide average temperature of 52.4°F, it is somewhat drier than average for Indiana.
Climate Profile
About Jay County Weather
A Typical Midwestern Four-Season Profile
Jay County averages 50.3°F annually, making it cooler than the typical U.S. county. The region experiences a humid continental climate defined by distinct seasonal variability.
Ranking Low on State Temperature Scales
The county's average temperature sits nearly two degrees below the Indiana statewide mark of 52.2°F. It remains one of the cooler jurisdictions in the eastern part of the state.
Consistent with East-Central Indiana Patterns
Jay shares a similar climate profile with neighboring Wells and Adams counties to the north. It receives 39.9 inches of rain, which is roughly four inches less than the Indiana average.
Mild Summers and Snowy Winters
The county sees a modest 13 days of extreme heat above 90°F during the 71.1°F summers. Winter brings 19.4 inches of snow and an average temperature of 28.2°F.
Insulate for Cold Winter Nights
Homeowners should prioritize attic insulation to maintain warmth during the sub-freezing January nights. A standard snow shovel or blower handles the 19 inches of annual accumulation.
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.