Franklin County Climate
Franklin County, Indiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.5°F
Annual Precip
43.8"
Annual Snowfall
17.6"
Extreme Heat Days
32
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,639
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Franklin County
Climate Verdict
Franklin County has a mild, with an average annual temperature of 53.5°F, moderately wet with 43.8 inches of annual precipitation, occasional hot days — 31.5 per year above 90°F, light snow averaging 17.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.3°F. summers are warm — July averages 75.4°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Franklin County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Franklin County closely matches the Indiana statewide average temperature of 52.4°F.
Climate Profile
About Franklin County Weather
Mirroring the National Temperature Median
Franklin County’s average annual temperature of 53.5°F almost perfectly matches the national median of 53.8°F. This makes it one of the most temperature-representative counties in the region compared to the rest of the country.
A Warm Spot on the Indiana Map
The county is warmer than the state average, posting 53.5°F against Indiana's 52.2°F. Its annual precipitation of 43.8 inches is nearly identical to the statewide average of 43.9 inches.
Leading the Region in Summer Heat
Franklin County experiences 32 days of extreme heat per year, significantly more than Grant County's 14 days. This southern-shifted climate brings more July heat than most counties in central and northern Indiana.
High Heat Humidity and Brisk Winters
July is the warmest month with an average of 75.4°F, frequently pushing past the 90°F mark. Winters are relatively moderate for the state, with a December-February average of 32.0°F and 17.6 inches of snow.
Preparing for Extreme Summer Heat Waves
With over a month of 90°F+ days, residents should ensure their cooling systems are serviced early in the spring. The 17.6 inches of snow is manageable, but high-quality rain gear is necessary for the 43.8 inches of annual rainfall.
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.