Maine frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Waite | May 6 | Oct 8 | 155 d | 5a |
| Waldoboro | Apr 27 | Oct 18 | 174 d | 6a |
| Wallagrass | May 23 | Sep 24 | 124 d | 4a |
| Walpole | Apr 27 | Oct 18 | 174 d | 6a |
| Warren | Apr 27 | Oct 19 | 175 d | 5b |
| Washburn | May 7 | Oct 1 | 147 d | 4a |
| Washington | Apr 27 | Oct 19 | 175 d | 5b |
| Waterboro | May 14 | Sep 30 | 139 d | 5b |
| Waterford | May 5 | Oct 5 | 153 d | 5a |
| Waterville | May 2 | Oct 10 | 161 d | 5b |
| Wayne | May 11 | Sep 29 | 141 d | 5b |
| Weld | May 4 | Oct 6 | 155 d | 5a |
| Wells | May 1 | Oct 14 | 166 d | 6a |
| Wesley | May 2 | Oct 15 | 166 d | 5b |
| West Baldwin | May 12 | Oct 1 | 142 d | 5a |
| West Bethel | May 6 | Oct 2 | 149 d | 5a |
| West Boothbay Harbor | Apr 28 | Oct 21 | 176 d | 6a |
| West Enfield | May 4 | Oct 6 | 155 d | 5a |
| West Farmington | May 16 | Sep 26 | 133 d | 5a |
| West Forks | May 13 | Sep 30 | 140 d | 4b |
| West Kennebunk | May 9 | Oct 3 | 147 d | 5b |
| West Minot | Apr 25 | Oct 19 | 177 d | 5b |
| West Newfield | May 16 | Sep 30 | 137 d | 5b |
| West Paris | May 6 | Oct 2 | 149 d | 5a |
| West Poland | May 3 | Oct 7 | 157 d | 5b |
| West Rockport | Apr 27 | Oct 19 | 175 d | 5b |
| Westbrook | Apr 26 | Oct 15 | 172 d | 5b |
| Westfield | May 14 | Sep 26 | 135 d | 4a |
| Whitefield | Apr 27 | Oct 18 | 174 d | 5b |
| Whiting | Apr 29 | Oct 25 | 179 d | 5b |
| Wilton | May 16 | Sep 26 | 133 d | 5a |
| Windham | Apr 30 | Oct 20 | 173 d | 5b |
| Windsor | Apr 27 | Oct 16 | 172 d | 5b |
| Winn | May 4 | Oct 6 | 155 d | 5a |
| Winter Harbor | Apr 27 | Oct 22 | 178 d | 6a |
| Winterport | May 4 | Oct 4 | 153 d | 5a |
| Winthrop | Apr 27 | Oct 16 | 172 d | 5b |
| Wiscasset | May 8 | Oct 7 | 152 d | 5b |
| Woolwich | May 10 | Oct 6 | 149 d | 5b |
| Wytopitlock | May 25 | Sep 24 | 122 d | 4b |