Sac County Climate
Sac County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
46.6°F
Annual Precip
33.0"
Annual Snowfall
30.9"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,776
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Sac County
Climate Verdict
Sac County has a cool, averaging 46.6°F annually, moderate rainfall of 33.0 inches per year, rare extreme heat with only 13.3 days above 90°F annually, moderate snowfall of 30.9 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 17.1°F. summers are warm — July averages 72.5°F. Residents experience a substantial 55°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Sac County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Sac County closely matches the Iowa statewide average temperature of 48.0°F, it is somewhat drier than average for Iowa.
Climate Profile
About Sac County Weather
Sac County Maintains a Cool Continental Profile
Sac County averages 46.6°F annually, placing it significantly below the national median of approximately 54°F. This typical continental climate experiences sharp seasonal shifts and stays roughly 7 degrees cooler than the broader U.S. average.
Colder Than the Average Iowa County
The county's annual average of 46.6°F sits 1.4 degrees below the Iowa state average of 48.0°F. While Iowa is known for its chill, Sac County remains one of the state's cooler jurisdictions.
Drier Conditions Relative to Eastern Neighbors
With 33.0 inches of annual precipitation, Sac County receives about 3 inches less rain and snow than the state average. This puts it on the drier end of the spectrum compared to Iowa's more humid eastern counties.
Bitter Winters and Moderate Summer Heat
Winter temperatures drop to an average of 17.1°F in January, accompanied by 30.9 inches of annual snowfall. Summers are mild with a July average of 72.5°F, though residents still face 13 days of extreme heat over 90°F.
Prepare for Snow and Seasonal Fluctuations
Heavy-duty snow removal equipment is essential for managing the nearly 31 inches of annual snowfall. Residents should also insulate homes thoroughly to handle winter lows that regularly average near 20.5°F.
Frequently Asked Questions
What is the average temperature in Sac County?
How much rain does Sac County get?
Does it snow in Sac County?
How hot does Sac County get in summer?
How cold are winters in Sac County?
Track your own weather in Sac County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.