Adams County Climate
Adams County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.4°F
Annual Precip
35.3"
Annual Snowfall
27.8"
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
3,122
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Adams County
Climate Verdict
Adams County has a cool, averaging 49.4°F annually, moderate rainfall of 35.3 inches per year, rare extreme heat with only 17.1 days above 90°F annually, moderate snowfall of 27.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 21.7°F. summers are warm — July averages 74.2°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Adams County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Adams County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Adams County Weather
Adams Stays Cooler Than National Average
Adams County averages 49.4°F, positioning it below the national median but within the typical Midwestern range. The local climate features moderate precipitation of 35.3 inches annually.
Among Iowa's Warmer Southern Tier
Adams is over a degree warmer than the statewide average of 48.0°F. This makes it one of the more temperate counties in the southern part of the state.
Consistent Weather with Regional Neighbors
It shares similar heat patterns with Adair, though it records slightly more annual snowfall at 27.8 inches. Its annual precipitation of 35.3 inches is slightly lower than the state benchmark.
High Summer Heat and Chilly Winters
Summer heat peaks with 17 days above 90°F, while July averages 74.2°F. Winter remains cold with an average temperature of 24.9°F from December through February.
Maintenance for Snowy Adams County Winters
Plan for significant winter maintenance to manage the 27.8 inches of average snowfall. Cooling costs likely peak during the 17 extreme heat days in mid-summer.
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.