Jackson County Climate
Jackson County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.3°F
Annual Precip
37.3"
Annual Snowfall
31.1"
Extreme Heat Days
14
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,962
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Jackson County
Climate Verdict
Jackson County has a cool, averaging 48.3°F annually, moderate rainfall of 37.3 inches per year, rare extreme heat with only 13.65 days above 90°F annually, moderate snowfall of 31.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.8°F. summers are warm — July averages 73.0°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Jackson County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Jackson County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Jackson County Weather
Jackson County's Continental Climate
Jackson County averages 48.3°F annually, placing it significantly below the national median temperature. This climate features a classic midwestern mix of cold winters and warm, humid summers.
Slightly Warmer and Wetter than Iowa Norms
The county's average temperature sits just above the Iowa state average of 48.0°F. With 37.3 inches of annual precipitation, it is slightly wetter than the 36.1-inch state average.
A Warmer Pocket in the Region
Jackson is warmer than its neighbor Jones County, which averages 47.0°F annually. Its 31.1 inches of snowfall aligns closely with regional patterns for eastern Iowa.
Steady Snow and Moderate Summer Heat
Winters are cold with a 19.8°F January average and 31.1 inches of snow. Summers reach a July average of 73.0°F, typically seeing 14 days where temperatures exceed 90°F.
Prepare for Snow and Humid Summers
Reliable snow removal equipment is essential to manage the 31 inches of annual snowfall. Residents should also service their HVAC systems to handle the two weeks of extreme 90°F heat.
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.