DeKalb County Climate
DeKalb County, Indiana
Avg Annual Temp
48.9°F
Annual Precip
38.2"
Annual Snowfall
32.8"
Extreme Heat Days
12.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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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Track your own weather in DeKalb County
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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.