Massachusetts frost dates: P
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Palmer | May 3 | Oct 14 | 164 d | 6a |
| Paxton | Apr 23 | Oct 21 | 181 d | 6a |
| Peabody | Apr 24 | Oct 17 | 176 d | 6b |
| Pembroke | Apr 15 | Nov 1 | 200 d | 6b |
| Pepperell | Apr 29 | Oct 8 | 162 d | 6a |
| Petersham | May 4 | Oct 8 | 157 d | 6a |
| Pinehurst | Apr 27 | Oct 13 | 169 d | 6b |
| Pittsfield | May 5 | Oct 5 | 153 d | 5b |
| Plainfield | May 17 | Oct 1 | 137 d | 5b |
| Plainville | Apr 27 | Oct 15 | 171 d | 6b |
| Plymouth | Apr 15 | Nov 1 | 200 d | 7a |
| Plympton | Apr 30 | Oct 16 | 169 d | 6b |
| Pocasset | Apr 21 | Oct 24 | 186 d | 7a |
| Prides Crossing | May 4 | Oct 12 | 161 d | 6b |
| Princeton | May 12 | Oct 1 | 142 d | 6a |
| Provincetown | Apr 15 | Nov 1 | 200 d | 7b |