Hamilton County Climate
Hamilton County, Indiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.6°F
Annual Precip
43.2"
Annual Snowfall
20.3"
Extreme Heat Days
18
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,326
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Hamilton County
Climate Verdict
Hamilton County has a mild, with an average annual temperature of 51.6°F, moderately wet with 43.2 inches of annual precipitation, rare extreme heat with only 18.2 days above 90°F annually, moderate snowfall of 20.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.6°F. summers are warm — July averages 74.2°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Hamilton County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Hamilton County closely matches the Indiana statewide average temperature of 52.4°F.
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 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.