Poweshiek County Climate
Poweshiek County, Iowa
Avg Annual Temp
47.5°F
Annual Precip
37.8"
Annual Snowfall
30.3"
Extreme Heat Days
11
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Poweshiek County Weather
Cooler Temps with High Annual Rainfall
Poweshiek County averages 47.5°F, making it cooler than the national median. Its 37.8 inches of precipitation are relatively high, characterizing this humid continental region.
Wetter and Cooler Than State Benchmarks
Poweshiek County is wetter than the average Iowa county, receiving 37.8 inches of precipitation against the state's 36.1 inches. Its 47.5°F average temperature is slightly cooler than the 48.0°F state mean.
Milder Summers Than Neighboring Polk
Compared to Polk County, Poweshiek is much cooler in the summer, with only 11 heat days versus Polk's 21. It also receives over an inch more precipitation annually than its western neighbor.
Pleasant Summers and Typical Iowa Winters
With only 11 days over 90°F, summers are more temperate than much of the state. Winter brings 30.3 inches of snow and a January average temperature of 19.3°F.
Focus on Moisture and Storm Prep
Given the 37.8 inches of rain and snow, ensuring proper basement waterproofing and gutter maintenance is vital. Summer cooling needs are lower here than in surrounding counties.
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.