Tama County Climate
Tama County, Iowa
Avg Annual Temp
47.3°F
Annual Precip
37.1"
Annual Snowfall
31.5"
Extreme Heat Days
12.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Tama County Weather
Tama County Experiences Classic Continental Extremes
An annual average of 47.3°F places Tama County in the cooler bracket of the United States. Its weather is characterized by significant variations between the freezing winter and warm summer months.
Slightly Cooler Than the Iowa Median
Tama County's average temperature of 47.3°F sits 0.7 degrees below the Iowa state average of 48.0°F. While typical for the state, it leans toward the cooler side of the central Iowa region.
Higher Precipitation Than Western Neighbors
The county receives 37.1 inches of precipitation annually, exceeding the state average of 36.1 inches. This makes Tama slightly wetter than counties further west, favoring robust agricultural cycles.
Heavy Snow and Mild Summer Peaks
Winter brings a significant 31.5 inches of snow and a January average of 18.1°F. Summers are relatively comfortable, with only 12 days of extreme heat reaching 90°F or higher.
Winter Preparedness is Top Priority
The 31.5 inches of annual snow requires reliable clearing equipment and weather-tight home sealing. Because extreme heat is limited to 12 days, residents can focus more on winterizing than summer cooling.
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.