New Hampshire frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Walpole | May 8 | Oct 3 | 148 d | 5b |
| Warner | May 14 | Sep 29 | 138 d | 5b |
| Warren | May 12 | Oct 6 | 147 d | 5a |
| Washington | May 15 | Sep 27 | 135 d | 6a |
| Waterville Valley | May 15 | Sep 28 | 136 d | 5a |
| Weare | May 2 | Oct 8 | 159 d | 6a |
| Wentworth | May 12 | Oct 6 | 147 d | 5a |
| West Chesterfield | May 14 | Oct 1 | 140 d | 5b |
| West Lebanon | May 9 | Oct 6 | 150 d | 5a |
| West Nottingham | May 8 | Oct 4 | 149 d | 6a |
| West Ossipee | May 16 | Sep 26 | 133 d | 5a |
| West Peterborough | May 5 | Oct 6 | 154 d | 5b |
| West Stewartstown | May 19 | Sep 29 | 133 d | 4a |
| West Swanzey | May 14 | Oct 1 | 140 d | 5b |
| Westmoreland | May 8 | Oct 3 | 148 d | 5b |
| Whitefield | May 27 | Sep 19 | 115 d | 4b |
| Wilmot | May 21 | Sep 26 | 128 d | 5b |
| Wilton | May 10 | Oct 6 | 149 d | 6a |
| Winchester | May 14 | Oct 1 | 140 d | 6a |
| Windham | May 3 | Oct 8 | 158 d | 6a |
| Winnisquam | Apr 30 | Oct 18 | 171 d | 5b |
| Wolfeboro | Apr 30 | Oct 18 | 171 d | 5b |
| Wolfeboro Falls | Apr 30 | Oct 18 | 171 d | 5b |
| Wonalancet | May 16 | Sep 26 | 133 d | 5a |
| Woodstock | May 7 | Oct 4 | 150 d | 5b |
| Woodsville | May 15 | Sep 28 | 136 d | 5a |