Wisconsin · 78 stations
Wisconsin Frost Dates: 78 Weather Stations
78 NOAA weather stations in Wisconsin with at least 25 years of frost records.
| Station | Zone | Last spring frost (50%) | First fall frost (50%) | Frost-free days |
|---|---|---|---|---|
| Amery, WI | 4b | May 5 | October 4 | 151 |
| Arlington, WI | 5a | May 4 | October 6 | 154 |
| Beaver Dam, WI | 5a | May 2 | October 9 | 157 |
| Beloit, WI | 5b | May 1 | October 12 | 162 |
| Bloomer, WI | 4b | May 5 | October 3 | 151 |
| Brodhead, WI | 5a | April 29 | October 12 | 165 |
| Burlington, WI | 5b | May 5 | October 9 | 156 |
| Charmany Farm, WI | 5b | April 28 | October 15 | 169 |
| Chilton, WI | 5b | May 1 | October 14 | 162 |
| Clintonville, WI | 5a | May 4 | October 6 | 154 |
| Cumberland, WI | 4b | May 5 | October 4 | 152 |
| Dodgeville, WI | 5a | May 3 | October 7 | 157 |
| Eau Claire, WI | 4b | May 8 | October 4 | 149 |
| Ellsworth, WI | 4b | May 13 | September 29 | 139 |
| Fond du Lac, WI | 5b | May 1 | October 12 | 162 |
| Fort Atkinson, WI | 5b | April 28 | October 13 | 166 |
| Gays Mills, WI | 4b | May 3 | October 7 | 156 |
| Genoa Dam 8, WI | 5a | April 22 | October 17 | 178 |
| Germantown, WI | 5b | May 6 | October 8 | 154 |
| Gordon, WI | 4a | May 22 | September 26 | 126 |
| Grantsburg, WI | 4a | May 11 | October 1 | 141 |
| Green Bay, WI | 5b | April 30 | October 9 | 161 |
| Hancock Experiment Farm, WI | 5a | May 10 | October 3 | 146 |
| Hartford, WI | 5a | May 8 | October 3 | 148 |
| Horicon, WI | 5a | May 1 | October 10 | 158 |
| Hurley, WI | 4b | May 24 | September 28 | 128 |
| Kenosha, WI | 6a | April 19 | October 26 | 189 |
| Kewaunee, WI | 5b | May 1 | October 18 | 168 |
| La Crosse, WI | 5a | April 23 | October 17 | 177 |
| Lancaster, WI | 5a | April 27 | October 11 | 166 |
| Luck, WI | 4b | May 6 | October 4 | 149 |
| Lynxville Dam 9, WI | 5a | April 24 | October 17 | 175 |
| Madeline Island, WI | 5a | May 20 | October 9 | 140 |
| Madison (Madison-Dane Airport), WI | 5b | May 1 | October 10 | 160 |
| Manitowoc, WI | 5b | April 30 | October 20 | 171 |
| Marshfield, WI | 4b | May 5 | October 5 | 150 |
| Mather, WI | 4b | May 6 | October 3 | 148 |
| Mauston, WI | 5a | May 2 | October 7 | 158 |
| Medford, WI | 4b | May 11 | October 1 | 141 |
| Menomonie, WI | 4b | May 9 | October 1 | 143 |
| Merrill, WI | 4b | May 11 | September 30 | 139 |
| Mondovi, WI | 4b | May 10 | October 2 | 144 |
| Montello, WI | 5a | May 3 | October 5 | 153 |
| Neillsville, WI | 4b | May 10 | October 1 | 144 |
| New London, WI | 5a | May 4 | October 6 | 153 |
| Oconomowoc, WI | 5b | April 30 | October 12 | 164 |
| Oconto, WI | 5a | May 9 | October 6 | 150 |
| Oshkosh, WI | 5b | April 24 | October 20 | 178 |
| Plymouth, WI | 5b | May 3 | October 10 | 159 |
| Portage, WI | 5a | April 28 | October 10 | 164 |
| Prairie Du Chien, WI | 5a | April 28 | October 12 | 166 |
| Racine, WI | 6a | April 20 | October 24 | 184 |
| Rice Lake, WI | 4b | May 8 | October 2 | 145 |
| Ridgeland, WI | 4b | May 10 | September 29 | 140 |
| River Falls, WI | 4b | May 11 | October 1 | 143 |
| Rosholt, WI | 4b | May 6 | October 5 | 150 |
| Shawano, WI | 5a | May 9 | October 2 | 144 |
| Sparta, WI | 4b | May 9 | October 1 | 144 |
| Spooner, WI | 4a | May 14 | September 28 | 135 |
| St. Croix Falls, WI | 4a | May 4 | October 8 | 156 |
| Stevens Point, WI | 5a | May 4 | October 7 | 155 |
| Sturgeon Bay, WI | 5b | May 8 | October 13 | 157 |
| Superior, WI | 5a | May 6 | October 9 | 154 |
| Two Rivers, WI | 5b | April 27 | October 21 | 175 |
| UW Arboretum - Madison, WI | 5a | May 1 | October 9 | 161 |
| Viroqua, WI | 5a | May 7 | October 2 | 148 |
| Washington Island, WI | 6a | May 15 | October 14 | 152 |
| Watertown, WI | 5b | April 28 | October 12 | 167 |
| Waupaca, WI | 5a | May 8 | October 6 | 151 |
| Whitewater, WI | 5b | May 2 | October 9 | 157 |
| Winter, WI | 4a | May 19 | September 27 | 129 |
| Wisconsin Dells, WI | 5a | May 8 | October 3 | 146 |
| near Alma, WI | 5a | April 28 | October 14 | 168 |
| near Janesville, WI | 5b | April 26 | October 15 | 170 |
| near Milwaukee, WI | 6a | April 19 | October 29 | 192 |
| near Trempealeau, WI | 5a | April 29 | October 11 | 165 |
| near Wausau, WI | 5a | May 6 | October 4 | 150 |
| near Wauwatosa, WI | 5b | April 26 | October 18 | 173 |