Poweshiek County Climate
Poweshiek County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg 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
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,803
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Poweshiek County
Climate Verdict
Poweshiek County has a cool, averaging 47.5°F annually, moderate rainfall of 37.8 inches per year, rare extreme heat with only 11 days above 90°F annually, moderate snowfall of 30.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.3°F. summers are warm — July averages 72.5°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Poweshiek County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Poweshiek County closely matches the Iowa statewide average temperature of 48.0°F.
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 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.