Posey County Climate
Posey County, Indiana
Avg Annual Temp
56.3°F
Annual Precip
48.4"
Annual Snowfall
9.5"
Extreme Heat Days
38.900000000000006
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Posey County Weather
Subtropical heat in Indiana
Posey County averages 56.3°F, making it one of the warmer spots compared to the national median. It experiences a humid climate with 48.4 inches of annual precipitation.
One of Indiana’s hottest counties
The county is over four degrees warmer than the Indiana state average of 52.2°F. It represents the extreme southern climate of the state, with significantly more 90°F days than northern regions.
Hotter than its neighbors
Posey experiences 39 days of extreme heat, far more than neighboring Perry or Pike counties. While temperatures are similar, its summer peaks are more intense than almost anywhere else in the state.
Long summers and short winters
The July average reaches 77.7°F with 39 days of extreme heat per year. Winters are mild, averaging 35.5°F with less than 10 inches of annual snowfall.
Manage the extreme heat
With over five weeks of 90°F weather, reliable air conditioning and attic insulation are critical. Residents should also maintain exterior surfaces to withstand the 48.4 inches of annual rainfall.
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.