Tama County Climate
Tama County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.3°F
Annual Precip
37.1"
Annual Snowfall
31.5"
Extreme Heat Days
12
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,849
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Tama County
Climate Verdict
Tama County has a cool, averaging 47.3°F annually, moderate rainfall of 37.1 inches per year, rare extreme heat with only 12.4 days above 90°F annually, moderate snowfall of 31.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 18.1°F. summers are warm — July averages 72.5°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Tama County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Tama County closely matches the Iowa statewide average temperature of 48.0°F.
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 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.