Decatur County Climate
Decatur County, Indiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.6°F
Annual Precip
47.0"
Annual Snowfall
13.3"
Extreme Heat Days
16
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,710
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Decatur County
Climate Verdict
Decatur County has a mild, with an average annual temperature of 53.6°F, moderately wet with 47.0 inches of annual precipitation, rare extreme heat with only 15.5 days above 90°F annually, light snow averaging 13.3 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.9°F. summers are warm — July averages 75.4°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Decatur County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Decatur County closely matches the Indiana statewide average temperature of 52.4°F, it is somewhat wetter than average for Indiana.
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 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.