Wisconsin frost dates: D
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Dale | May 4 | Oct 6 | 155 d | 5a |
| Dallas | May 10 | Sep 29 | 142 d | 4b |
| Dalton | May 6 | Oct 2 | 149 d | 5a |
| Danbury | May 11 | Sep 30 | 142 d | 4a |
| Dane | May 1 | Oct 10 | 162 d | 5a |
| Darien | Apr 28 | Oct 14 | 169 d | 5b |
| Darlington | May 3 | Oct 4 | 154 d | 5a |
| De Pere | Apr 30 | Oct 9 | 162 d | 5b |
| De Soto | Apr 22 | Oct 17 | 178 d | 5a |
| Deer Park | May 5 | Oct 4 | 152 d | 4b |
| Deerbrook | May 14 | Sep 30 | 139 d | 4b |
| Deerfield | Apr 29 | Oct 14 | 168 d | 5b |
| Deforest | May 4 | Oct 6 | 155 d | 5a |
| Delafield | Apr 30 | Oct 12 | 165 d | 5b |
| Delavan | Apr 28 | Oct 14 | 169 d | 5b |
| Dellwood | May 9 | Oct 3 | 147 d | 4b |
| Denmark | May 6 | Oct 12 | 159 d | 5b |
| Dickeyville | Apr 19 | Oct 21 | 185 d | 5a |
| Dodge | May 5 | Oct 5 | 153 d | 4b |
| Dodgeville | May 3 | Oct 7 | 157 d | 5a |
| Dorchester | May 11 | Oct 1 | 143 d | 4b |
| Dousman | May 3 | Oct 9 | 159 d | 5b |
| Downing | May 10 | Sep 29 | 142 d | 4b |
| Downsville | May 9 | Oct 1 | 145 d | 4b |
| Doylestown | May 4 | Oct 6 | 155 d | 5a |
| Dresser | May 4 | Oct 8 | 157 d | 4b |
| Drummond | May 20 | Oct 1 | 134 d | 4a |
| Dunbar | May 24 | Sep 30 | 129 d | 4b |
| Durand | May 1 | Oct 10 | 162 d | 4b |