Wisconsin frost dates by county and ZIP code
Across 783 Wisconsin ZIP codes the average last spring frost runs Apr 19 to Jun 4 and the average first fall frost Sep 10 to Oct 29 (50% odds, 32°F, NOAA 1991–2020 normals), with USDA hardiness zones. Download the table as CSV.
Counties
- Adams
- Ashland
- Barron
- Bayfield
- Brown
- Buffalo
- Burnett
- Calumet
- Chippewa
- Clark
- Columbia
- Crawford
- Dane
- Dodge
- Door
- Douglas
- Dunn
- Eau Claire
- Florence
- Fond du Lac
- Forest
- Grant
- Green
- Green Lake
- Iowa
- Iron
- Jackson
- Jefferson
- Juneau
- Kenosha
- Kewaunee
- La Crosse
- Lafayette
- Langlade
- Lincoln
- Manitowoc
- Marathon
- Marinette
- Marquette
- Menominee
- Milwaukee
- Monroe
- Oconto
- Oneida
- Outagamie
- Ozaukee
- Pepin
- Pierce
- Polk
- Portage
- Price
- Racine
- Richland
- Rock
- Rusk
- Sauk
- Sawyer
- Shawano
- Sheboygan
- St. Croix
- Taylor
- Trempealeau
- Vernon
- Vilas
- Walworth
- Washburn
- Washington
- Waukesha
- Waupaca
- Waushara
- Winnebago
- Wood
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