Story County Climate
Story County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.1°F
Annual Precip
36.4"
Annual Snowfall
29.5"
Extreme Heat Days
14
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,980
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Story County
Climate Verdict
Story County has a cool, averaging 48.1°F annually, moderate rainfall of 36.4 inches per year, rare extreme heat with only 14.1 days above 90°F annually, moderate snowfall of 29.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.0°F. summers are warm — July averages 73.2°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Story County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Story County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Story County Weather
Story County Mirrors Central Iowa Averages
Story County maintains an annual average temperature of 48.1°F, placing it well below the national median. This climate is defined by cold winters and warm, humid summers typical of the Midwest.
The Definition of Iowa Weather
Story County's 48.1°F average is almost identical to the Iowa state average of 48.0°F. It serves as a perfect meteorological baseline for what to expect across the state.
Typical Precipitation Levels for the Heartland
The county receives 36.4 inches of precipitation annually, matching the state average of 36.1 inches almost exactly. It avoids the dryness of western Iowa and the heavier rains seen in the southeast.
Consistent Snowfall and Moderate Heat
January temperatures average 19.0°F while July sees a warm 73.2°F. The county averages 29.5 inches of snow and 14 days where the thermometer tops 90°F.
Balanced Seasonal Maintenance is Key
With nearly 30 inches of snow and two weeks of 90°F heat, residents must maintain both heating and cooling systems. The moderate July average of 73.2°F suggests a mix of active outdoor days and heat-safety awareness.
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.