St. Croix County Climate
St. Croix County, Wisconsin
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
42.6°F
Annual Precip
32.9"
Annual Snowfall
46.5"
Extreme Heat Days
4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
2,241
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. Croix County
Climate Verdict
St. Croix County has a cool, averaging 42.6°F annually, moderate rainfall of 32.9 inches per year, rare extreme heat with only 3.9 days above 90°F annually, moderate snowfall of 46.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 11.1°F. summers are pleasantly cool with July averaging 69.1°F. Residents experience a substantial 58°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
St. Croix County closely matches the Wisconsin statewide average temperature of 44.4°F.
Climate Profile
About St. Croix County Weather
Deep Interior Cold
St. Croix County averages 42.6°F annually, sitting far below the national median. Its position in the western interior subjects it to intense continental air masses and sharp seasonal swings.
Below the State Average
The county's average temperature of 42.6°F is nearly two degrees colder than the Wisconsin state average of 44.4°F. This makes it one of the chillier regions in the western part of the state.
Chillier Than Southern Neighbors
St. Croix is colder than Trempealeau to the south but stays slightly warmer than Taylor County to the east. Annual precipitation of 32.9 inches is lower than the 34.5-inch state average.
Hard Winters and Short Summers
January is particularly harsh with an average of 11.1°F and 46.5 inches of annual snowfall. Summer temperatures average 67.3°F, with only 4 days reaching the 90°F mark.
Winterize Your Daily Life
Heavy-duty insulation and reliable heating are essential for winter averages that hover around 15.0°F. Keep summer gear simple, as extreme heat is a rare occurrence in this region.
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.