Posey County Climate

Posey County, Indiana

JanFebMarAprMayJunJulAugSepOctNovDec56.3°AVG °F

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

54.4°F avgJFMAMJJASOND

Precipitation Calendar

Dry
Wet= snowfall
3.5"
3.3"
4.7"
5.3"
5.0"
4.6"
3.8"
3.3"
3.4"
3.5"
4.1"
4.0"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Seasonal Overview

Comfort ZoneSpring46°66°14.9"Summer75°78°11.7"Fall46°70°11.0"Winter33°37°10.8"20°40°60°80°100°

National Comparison

Warmer than 57% of US counties
Wetter than 68% of US counties
More seasonal variation than 52% of US counties

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

What is the average temperature in Posey County?
The average annual temperature in Posey County, IN is 56.3°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does Posey County get?
Posey County receives an average of 48.4 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.
Does it snow in Posey County?
Yes, Posey County receives an average of 9.5 inches of snowfall per year according to NOAA climate normals.
How hot does Posey County get in summer?
The average summer temperature (June-August) in Posey County is 76.2°F. The county experiences an average of 38.900000000000006 days per year above 90°F.
How cold are winters in Posey County?
The average winter temperature (December-February) in Posey County is 35.5°F. January, typically the coldest month, averages 33.0°F.

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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.

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