Decatur County Climate
Decatur County, Indiana
Avg Annual Temp
53.6°F
Annual Precip
47.0"
Annual Snowfall
13.3"
Extreme Heat Days
15.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Decatur County Weather
Typical American Climate Profile
Decatur County’s 53.6°F annual average temperature almost perfectly matches the national median. Its 47 inches of precipitation provide a well-watered environment for local agriculture.
Warmer than the State Average
The county sits 1.4 degrees warmer than the Indiana state average of 52.2°F. It receives about 3 inches more rain annually than the state norm.
Wetter than Central Neighbors
Decatur is more prone to rain than many neighboring counties, recording 47 inches of precipitation. It experiences 16 days of extreme heat, a moderate figure for the region.
Defined Four-Season Cycle
Summers are warm with a 75.4°F July average, while winters provide 13.3 inches of snow. The winter season remains relatively mild with a 31.6°F average.
Equip for Rainy Weather
Reliable rain gear is a must for the 47 inches of annual precipitation. Moderate winter temperatures mean residents can focus on standard insulation rather than heavy-duty heating.
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.