Wisconsin frost dates: P
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Packwaukee | May 3 | Oct 5 | 155 d | 5a |
| Palmyra | May 3 | Oct 9 | 159 d | 5b |
| Pardeeville | Apr 28 | Oct 10 | 165 d | 5a |
| Park Falls | May 15 | Sep 28 | 136 d | 4a |
| Patch Grove | Apr 28 | Oct 12 | 167 d | 5a |
| Pearson | May 14 | Sep 30 | 139 d | 4b |
| Pelican Lake | Jun 3 | Sep 18 | 107 d | 4b |
| Pell Lake | Apr 30 | Oct 13 | 166 d | 5b |
| Pembine | May 17 | Oct 1 | 137 d | 4b |
| Pepin | May 7 | Oct 2 | 148 d | 4b |
| Peshtigo | May 11 | Oct 5 | 147 d | 5a |
| Pewaukee | May 1 | Oct 13 | 165 d | 5b |
| Phelps | May 25 | Sep 24 | 122 d | 4b |
| Phillips | May 23 | Sep 23 | 123 d | 4a |
| Phlox | May 14 | Sep 30 | 139 d | 4b |
| Pickerel | May 19 | Sep 29 | 133 d | 4b |
| Pickett | May 1 | Oct 11 | 163 d | 5a |
| Pigeon Falls | May 9 | Oct 1 | 145 d | 4b |
| Pine River | May 1 | Oct 8 | 160 d | 5a |
| Pittsville | May 5 | Oct 5 | 153 d | 4b |
| Plain | Apr 30 | Oct 9 | 162 d | 5a |
| Plainfield | May 10 | Oct 3 | 146 d | 4b |
| Platteville | Apr 30 | Oct 13 | 166 d | 5a |
| Pleasant Prairie | Apr 19 | Oct 26 | 190 d | 5b |
| Plover | May 4 | Oct 7 | 156 d | 4b |
| Plum City | May 1 | Oct 10 | 162 d | 4b |
| Plymouth | May 3 | Oct 10 | 160 d | 5b |
| Poplar | May 24 | Sep 26 | 125 d | 4b |
| Port Edwards | May 8 | Oct 1 | 146 d | 4b |
| Port Washington | Apr 27 | Oct 22 | 178 d | 5b |
| Port Wing | May 31 | Oct 2 | 124 d | 5a |
| Portage | Apr 28 | Oct 10 | 165 d | 5a |
| Porterfield | May 4 | Oct 11 | 160 d | 5a |
| Potosi | Apr 19 | Oct 21 | 185 d | 5a |
| Potter | May 6 | Oct 6 | 153 d | 5b |
| Pound | May 14 | Oct 1 | 140 d | 5a |
| Powers Lake | Apr 30 | Oct 13 | 166 d | 5b |
| Poy Sippi | May 1 | Oct 8 | 160 d | 5a |
| Poynette | May 4 | Oct 6 | 155 d | 5a |
| Prairie Du Chien | Apr 28 | Oct 12 | 167 d | 5a |
| Prairie Du Sac | May 4 | Oct 6 | 155 d | 5a |
| Prairie Farm | May 10 | Sep 29 | 142 d | 4b |
| Prentice | May 23 | Sep 23 | 123 d | 4a |
| Prescott | Apr 23 | Oct 19 | 179 d | 4b |
| Presque Isle | May 25 | Sep 21 | 119 d | 4a |
| Princeton | May 3 | Oct 5 | 155 d | 5a |
| Pulaski | May 7 | Oct 9 | 155 d | 5a |