Maine frost dates: I
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Island Falls | May 13 | Sep 30 | 140 d | 4b |
| Isle Au Haut | Apr 27 | Oct 19 | 175 d | 6b |
| Isle Of Springs | Apr 27 | Oct 18 | 174 d | 6a |
| Islesboro | May 7 | Oct 5 | 151 d | 6a |
| Islesford | Apr 27 | Oct 22 | 178 d | 6b |
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Island Falls | May 13 | Sep 30 | 140 d | 4b |
| Isle Au Haut | Apr 27 | Oct 19 | 175 d | 6b |
| Isle Of Springs | Apr 27 | Oct 18 | 174 d | 6a |
| Islesboro | May 7 | Oct 5 | 151 d | 6a |
| Islesford | Apr 27 | Oct 22 | 178 d | 6b |