Wisconsin frost dates: A
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Abbotsford | May 11 | Oct 1 | 143 d | 4b |
| Abrams | May 9 | Oct 6 | 150 d | 5a |
| Adams | May 9 | Oct 3 | 147 d | 4b |
| Adell | May 3 | Oct 16 | 166 d | 5b |
| Afton | Apr 26 | Oct 15 | 172 d | 5b |
| Albany | Apr 29 | Oct 12 | 166 d | 5a |
| Algoma | May 6 | Oct 17 | 164 d | 5b |
| Allenton | May 1 | Oct 12 | 164 d | 5a |
| Alma | Apr 28 | Oct 14 | 169 d | 4b |
| Alma Center | May 9 | Oct 1 | 145 d | 4b |
| Almena | May 5 | Oct 4 | 152 d | 4b |
| Almond | May 10 | Oct 3 | 146 d | 4b |
| Altoona | Apr 24 | Oct 14 | 173 d | 4b |
| Amberg | May 22 | Sep 27 | 128 d | 4b |
| Amery | May 5 | Oct 4 | 152 d | 4b |
| Amherst | May 8 | Oct 6 | 151 d | 5a |
| Amherst Junction | May 4 | Oct 7 | 156 d | 5a |
| Aniwa | May 6 | Oct 4 | 151 d | 4b |
| Antigo | May 14 | Sep 30 | 139 d | 4b |
| Appleton | May 4 | Oct 6 | 155 d | 5b |
| Arcadia | May 5 | Oct 5 | 153 d | 4b |
| Arena | May 7 | Oct 1 | 147 d | 5a |
| Argonne | May 19 | Sep 29 | 133 d | 4b |
| Argyle | Apr 27 | Oct 14 | 170 d | 5a |
| Arkansaw | May 1 | Oct 10 | 162 d | 4b |
| Arkdale | May 9 | Oct 3 | 147 d | 4b |
| Arlington | May 4 | Oct 6 | 155 d | 5a |
| Armstrong Creek | May 24 | Sep 30 | 129 d | 4b |
| Arpin | May 5 | Oct 5 | 153 d | 4b |
| Ashippun | Apr 30 | Oct 12 | 165 d | 5a |
| Ashland | May 20 | Oct 2 | 135 d | 5a |
| Athelstane | May 26 | Sep 22 | 119 d | 4b |
| Athens | May 6 | Oct 4 | 151 d | 4b |
| Auburndale | May 5 | Oct 5 | 153 d | 4b |
| Augusta | May 7 | Oct 1 | 147 d | 4b |
| Avalon | Apr 30 | Oct 10 | 163 d | 5b |
| Avoca | Apr 30 | Oct 9 | 162 d | 5a |