Trempealeau County Climate
Trempealeau County, Wisconsin
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
45.4°F
Annual Precip
35.2"
Annual Snowfall
40.7"
Extreme Heat Days
9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
2,541
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Trempealeau County
Climate Verdict
Trempealeau County has a cool, averaging 45.4°F annually, moderate rainfall of 35.2 inches per year, rare extreme heat with only 9.45 days above 90°F annually, moderate snowfall of 40.7 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 15.7°F. summers are warm — July averages 71.0°F. Residents experience a substantial 55°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Trempealeau County closely matches the Wisconsin statewide average temperature of 44.4°F.
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 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.