Michigan frost dates: P
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Painesdale | Jun 1 | Sep 23 | 114 d | 5a |
| Palmer | May 22 | Sep 29 | 130 d | 5a |
| Palms | May 2 | Oct 24 | 175 d | 6a |
| Palmyra | Apr 29 | Oct 13 | 167 d | 6a |
| Palo | May 3 | Oct 12 | 162 d | 6a |
| Paradise | May 31 | Oct 1 | 123 d | 5a |
| Paris | May 13 | Oct 2 | 142 d | 5a |
| Parma | May 1 | Oct 14 | 166 d | 6a |
| Paw Paw | May 7 | Oct 11 | 157 d | 6a |
| Peck | May 12 | Oct 5 | 146 d | 6a |
| Pelkie | May 25 | Sep 23 | 121 d | 5a |
| Pellston | May 31 | Sep 18 | 110 d | 5a |
| Pentwater | May 17 | Oct 7 | 143 d | 6b |
| Perkins | May 18 | Oct 4 | 139 d | 5a |
| Perrinton | Apr 28 | Oct 24 | 179 d | 6a |
| Perronville | May 19 | Oct 1 | 135 d | 5a |
| Perry | May 1 | Oct 15 | 167 d | 6a |
| Petersburg | Apr 27 | Oct 21 | 177 d | 6a |
| Petoskey | May 16 | Oct 9 | 146 d | 5b |
| Pewamo | May 3 | Oct 12 | 162 d | 6a |
| Pickford | May 31 | Sep 25 | 117 d | 4b |
| Pierson | May 14 | Sep 29 | 138 d | 5b |
| Pigeon | May 8 | Oct 17 | 162 d | 6a |
| Pinckney | Apr 30 | Oct 14 | 167 d | 6a |
| Pinconning | May 5 | Oct 10 | 158 d | 6a |
| Pittsford | May 3 | Oct 12 | 162 d | 6a |
| Plainwell | Apr 29 | Oct 20 | 174 d | 6a |
| Pleasant Lake | May 1 | Oct 14 | 166 d | 6a |
| Pleasant Ridge | Apr 21 | Oct 31 | 193 d | 6b |
| Plymouth | May 1 | Oct 17 | 169 d | 6a |
| Pointe Aux Pins | May 11 | Oct 11 | 153 d | 5b |
| Pompeii | Apr 28 | Oct 24 | 179 d | 6a |
| Pontiac | Apr 26 | Oct 22 | 179 d | 6a |
| Port Austin | May 4 | Oct 26 | 175 d | 6a |
| Port Hope | May 5 | Oct 24 | 172 d | 6a |
| Port Huron | Apr 19 | Nov 3 | 198 d | 6b |
| Port Sanilac | May 4 | Oct 24 | 173 d | 6a |
| Portage | Apr 28 | Oct 18 | 173 d | 6a |
| Portland | May 3 | Oct 12 | 162 d | 6a |
| Posen | May 13 | Oct 3 | 143 d | 5b |
| Potterville | May 1 | Oct 15 | 167 d | 6a |
| Powers | May 19 | Oct 1 | 135 d | 5a |
| Prescott | May 15 | Oct 4 | 142 d | 5a |
| Presque Isle | May 13 | Oct 3 | 143 d | 6a |
| Prudenville | May 19 | Sep 23 | 127 d | 5a |
| Pullman | May 7 | Oct 11 | 157 d | 6a |