DeKalb County Climate
DeKalb County, Indiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.9°F
Annual Precip
38.2"
Annual Snowfall
32.8"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,809
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: DeKalb County
Climate Verdict
DeKalb County has a cool, averaging 48.9°F annually, moderate rainfall of 38.2 inches per year, rare extreme heat with only 12.8 days above 90°F annually, moderate snowfall of 32.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.8°F. summers are warm — July averages 71.8°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for DeKalb County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
DeKalb County is 3.5°F cooler than the Indiana statewide average of 52.4°F, it is also noticeably drier, receiving 6.0 inches less precipitation than the state average.
Climate Profile
About DeKalb County Weather
Cooler and Snowier than Most
DeKalb County’s 48.9°F average temperature is significantly lower than the national median. It receives 38.2 inches of precipitation, which is drier than many eastern U.S. counties.
One of Indiana’s Coldest
At 48.9°F, DeKalb is much colder than the Indiana average of 52.2°F. It sits in the state's northeastern corner, where winter weather is most intense.
The Regional Snow Leader
DeKalb averages 32.8 inches of snow, which is more than double the accumulation in central Indiana counties like Decatur. It is also 5.7 inches drier than the state average.
Harsh Winters and Mild Summers
Winter is the dominant season with 32.8 inches of snow and a 26.5°F average. Summers are very pleasant, with only 13 extreme heat days and a 69.9°F seasonal mean.
Focus on Winter Readiness
Heavy-duty snow blowers and high-end insulation are essential for the 32.8 inches of snow. Summer cooling needs are minimal compared to the rest of Indiana.
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.