Trempealeau County Climate
Trempealeau County, Wisconsin
Avg Annual Temp
45.4°F
Annual Precip
35.2"
Annual Snowfall
40.7"
Extreme Heat Days
9.45
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Trempealeau County Weather
Moderate Upper Midwest Climate
Trempealeau County averages 45.4°F annually, trailing the national median but ranking as one of the warmer spots in the region. The Driftless Area terrain creates unique local wind and weather patterns.
Warmer and Wetter Than Average
The county is a full degree warmer than the Wisconsin state average of 44.4°F. It also receives 35.2 inches of precipitation, exceeding the state norm of 34.5 inches.
A Regional Warm Spot
Trempealeau is warmer than northern neighbor Taylor (42.0°F) but slightly cooler than Vernon to the south. It receives more precipitation than western neighbors like St. Croix.
Humid Summers and Snowy Winters
Summers are active with 9 days of extreme heat over 90°F and a July average of 71.0°F. Winters bring 40.7 inches of snow and a January average of 15.7°F.
Managing Heat and Moisture
Prepare for both heavy rain and extreme heat by maintaining clean gutters and efficient air conditioning. The 9 days of 90°F+ heat require better cooling capacity than in northern Wisconsin.
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.