Hamilton County Climate
Hamilton County, Indiana
Avg Annual Temp
51.6°F
Annual Precip
43.2"
Annual Snowfall
20.3"
Extreme Heat Days
18.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hamilton County Weather
A Classic Midwestern Continental Climate
Hamilton County's average annual temperature of 51.6°F is slightly cooler than the national median. It experiences a classic continental climate with four distinct seasons and moderate precipitation.
Cooler and Drier Than Indiana Averages
The county’s 51.6°F average sits just below the Indiana state average of 52.2°F. It is also slightly drier than the state norm, receiving 43.2 inches of precipitation annually compared to 43.9 inches statewide.
Consistent Weather Across the Metro North
Hamilton’s 51.6°F average is nearly identical to neighboring Hancock’s 51.9°F. Both counties share similar weather patterns, though Hamilton is slightly drier than its neighbor to the southeast.
Warm July Days and Snowy Januarys
Summers reach an average of 72.6°F with 18 days topping 90°F annually. Winters are brisk at 29.4°F, delivering about 20.3 inches of snow to the region.
Prepare for Humidity and Winter Chills
Residents should optimize HVAC systems for the 18 high-heat days and the 26.6°F January lows. Proper snow removal gear is essential for handling the 20 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.