Osceola County Climate
Osceola County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
44.5°F
Annual Precip
30.5"
Annual Snowfall
43.5"
Extreme Heat Days
10
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,569
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Osceola County
Climate Verdict
Osceola County has a cool, averaging 44.5°F annually, moderate rainfall of 30.5 inches per year, rare extreme heat with only 9.5 days above 90°F annually, moderate snowfall of 43.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 13.9°F. summers are warm — July averages 71.2°F. Residents experience a substantial 57°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Osceola County is 3.5°F cooler than the Iowa statewide average of 48.0°F, it is also noticeably drier, receiving 5.6 inches less precipitation than the state average.
Climate Profile
About Osceola County Weather
One of the Region's Coldest
Osceola County averages just 44.5°F annually, which is among the lowest in the Midwest and far below the national median. It receives 30.5 inches of precipitation.
Deep Below the State Mean
Osceola sits 3.5 degrees below the Iowa average of 48.0°F. This gap is driven by a very low January average temperature of 13.9°F.
The Coldest of Neighbors
Osceola is the coldest county in this group, averaging over 6 degrees less than Mills. It is even colder and snowier than its neighbor O'Brien.
Intense Winter, Rare Heat
With 43.5 inches of snow and only 10 days of extreme heat, winter is the dominant season. The winter average temperature is a frigid 17.3°F.
Prioritize Home Heating
Focus your home maintenance budget on high-efficiency heating and insulation to withstand the 13.9°F January lows. Snow management is a major consideration for the 43.5 inches of annual accumulation.
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.