Jay County Climate
Jay County, Indiana
Avg Annual Temp
50.3°F
Annual Precip
39.9"
Annual Snowfall
19.4"
Extreme Heat Days
13.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.