Wisconsin frost dates: K
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Kansasville | May 5 | Oct 8 | 156 d | 5b |
| Kaukauna | May 4 | Oct 6 | 155 d | 5b |
| Kellnersville | May 6 | Oct 12 | 159 d | 5b |
| Kendall | May 5 | Oct 4 | 152 d | 5a |
| Kennan | May 23 | Sep 23 | 123 d | 4a |
| Kenosha | Apr 19 | Oct 26 | 190 d | 6a |
| Keshena | May 9 | Oct 2 | 146 d | 5a |
| Kewaskum | May 1 | Oct 12 | 164 d | 5b |
| Kewaunee | May 1 | Oct 18 | 170 d | 5b |
| Kiel | May 1 | Oct 14 | 166 d | 5b |
| Kieler | Apr 19 | Oct 21 | 185 d | 5a |
| Kimberly | May 4 | Oct 6 | 155 d | 5b |
| King | May 8 | Oct 6 | 151 d | 5a |
| Kingston | May 6 | Oct 2 | 149 d | 5a |
| Knapp | May 9 | Oct 1 | 145 d | 4b |
| Kohler | Apr 25 | Oct 23 | 181 d | 5b |
| Krakow | May 14 | Oct 1 | 140 d | 5a |