Jackson County Climate
Jackson County, Iowa
Avg Annual Temp
48.3°F
Annual Precip
37.3"
Annual Snowfall
31.1"
Extreme Heat Days
13.65
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.