Dearborn County Climate
Dearborn County, Indiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.3°F
Annual Precip
47.5"
Annual Snowfall
15.9"
Extreme Heat Days
7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,075
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Dearborn County
Climate Verdict
Dearborn County has a mild, with an average annual temperature of 51.3°F, moderately wet with 47.5 inches of annual precipitation, rare extreme heat with only 6.6 days above 90°F annually, light snow averaging 15.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.0°F. summers are warm — July averages 72.3°F. The 44°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Dearborn County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Dearborn County closely matches the Indiana statewide average temperature of 52.4°F, it is somewhat wetter than average for Indiana.
Climate Profile
About Dearborn County Weather
Moderate and Very Humid
Dearborn County’s 51.3°F average temperature is slightly cooler than the national median. However, its 47.5 inches of precipitation makes it much wetter than the national average.
Colder and Wetter than Indiana
Despite its southeastern position, the county is nearly a degree cooler than the state average of 52.2°F. It receives significantly more precipitation than the Indiana average of 43.9 inches.
Fewer Extreme Heat Days
Dearborn only sees 7 days above 90°F annually, which is fewer than many surrounding counties. It maintains a damp climate with 15.9 inches of annual snowfall.
Mild Summers and Damp Winters
Summers are relatively comfortable with a July average of 72.3°F. Winter temperatures average 30.5°F, often bringing a mix of rain and 15.9 inches of snow.
Prioritize Dehumidification
With 47.5 inches of rain, moisture control in basements and crawlspaces is essential. Standard heating systems are adequate for the manageable 28.0°F January average.
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.