Louisa County Climate
Louisa County, Iowa
Avg Annual Temp
48.8°F
Annual Precip
38.6"
Annual Snowfall
33.4"
Extreme Heat Days
16.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Louisa County Weather
Consistent humid continental patterns
Louisa County's annual average of 48.8°F reflects a temperate climate that is cooler than the U.S. national median. The region experiences distinct seasonal transitions typical of the American Midwest.
Warmer and wetter than most of Iowa
The county's 48.8°F average temperature exceeds the state baseline of 48.0°F. Additionally, its 38.6 inches of annual precipitation is significantly higher than the Iowa average of 36.1 inches.
Leading neighbors in precipitation
Louisa is wetter than neighboring Linn County, receiving an extra 1.5 inches of precipitation annually. It also experiences more extreme heat days than Linn, totaling 17 days per year above 90°F.
Heavier snowfall and humid summers
The county receives 33.4 inches of snow annually, which is higher than many of its immediate neighbors. Summer temperatures peak in July at 73.4°F, while winter averages stay around 23.6°F.
Equip homes for humidity and snow
With 17 days of extreme heat, central air conditioning is vital for comfortable summers. Homeowners should also prepare for heavier snow loads compared to counties further west.
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.