Monona County Climate
Monona County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.0°F
Annual Precip
31.4"
Annual Snowfall
28.6"
Extreme Heat Days
20
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
3,004
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Monona County
Climate Verdict
Monona County has a cool, averaging 48.0°F annually, moderate rainfall of 31.4 inches per year, rare extreme heat with only 19.900000000000002 days above 90°F annually, moderate snowfall of 28.6 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.1°F. summers are warm — July averages 73.7°F. Residents experience a substantial 55°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Monona County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Monona County closely matches the Iowa statewide average temperature of 48.0°F, it is somewhat drier than average for Iowa.
Climate Profile
About Monona County Weather
The Definition of Mid-Continental
Monona County averages 48.0°F annually, which is well below the national median but typical for the plains. It is slightly drier than average with 31.4 inches of precipitation.
Matching the State Baseline
Monona perfectly matches the Iowa state average temperature of 48.0°F. It serves as a climate benchmark for the transition between southern warmth and northern cold.
Cooler Than the South
The county is nearly 3 degrees cooler on average than Mills County to the south. However, it remains warmer than O'Brien County which sits further north.
Balanced Seasonal Extremes
Residents face 20 days of 90°F heat and 28.6 inches of annual snowfall. January is the coldest month, averaging 19.1°F, while July averages 73.7°F.
Versatile Home Prep Required
HVAC systems must be robust enough to handle both the 20 days of extreme heat and winter lows. Plan for moderate snow removal tasks to manage the 28.6 inches of annual accumulation.
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.