Story County Climate
Story County, Iowa
Avg Annual Temp
48.1°F
Annual Precip
36.4"
Annual Snowfall
29.5"
Extreme Heat Days
14.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.