Minnesota frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Wabasha | Apr 28 | Oct 14 | 169 d | 4b |
| Wabasso | May 3 | Oct 2 | 152 d | 4b |
| Waconia | May 5 | Oct 5 | 153 d | 4b |
| Wadena | May 10 | Sep 30 | 143 d | 4a |
| Wahkon | May 10 | Oct 3 | 146 d | 4a |
| Waite Park | May 3 | Oct 7 | 157 d | 4b |
| Waldorf | May 2 | Oct 4 | 155 d | 5a |
| Walker | May 4 | Oct 7 | 156 d | 4a |
| Walnut Grove | May 2 | Oct 5 | 156 d | 5a |
| Waltham | Apr 30 | Oct 5 | 158 d | 4b |
| Wanamingo | May 9 | Sep 30 | 144 d | 4b |
| Wanda | May 3 | Oct 2 | 152 d | 4b |
| Wannaska | May 25 | Sep 22 | 120 d | 3b |
| Warba | May 17 | Sep 24 | 130 d | 4a |
| Warren | May 5 | Oct 2 | 150 d | 4a |
| Warroad | May 16 | Sep 24 | 131 d | 3b |
| Warsaw | May 5 | Oct 5 | 153 d | 4b |
| Waseca | May 2 | Oct 4 | 155 d | 4b |
| Waskish | May 22 | Sep 17 | 118 d | 3b |
| Watertown | Apr 30 | Oct 8 | 161 d | 4b |
| Waterville | May 2 | Oct 4 | 155 d | 4b |
| Watkins | May 2 | Oct 5 | 156 d | 4b |
| Watson | May 3 | Oct 2 | 152 d | 4b |
| Waubun | May 7 | Sep 28 | 144 d | 4a |
| Waverly | Apr 30 | Oct 8 | 161 d | 4b |
| Wayzata | Apr 29 | Oct 12 | 166 d | 5a |
| Webster | May 5 | Oct 5 | 153 d | 4b |
| Welch | Apr 23 | Oct 14 | 174 d | 4b |
| Welcome | Apr 25 | Oct 14 | 172 d | 5a |
| Wells | Apr 30 | Oct 6 | 159 d | 4b |
| Wendell | May 4 | Oct 5 | 154 d | 4a |
| West Concord | May 12 | Sep 28 | 139 d | 4b |
| West Union | May 13 | Sep 27 | 137 d | 4b |
| Westbrook | May 3 | Oct 2 | 152 d | 5a |
| Wheaton | May 1 | Oct 9 | 161 d | 4b |
| White Earth | May 5 | Oct 3 | 151 d | 4a |
| Willernie | Apr 30 | Oct 11 | 164 d | 5a |
| Williams | May 25 | Sep 22 | 120 d | 3b |
| Willmar | Apr 30 | Oct 7 | 160 d | 4b |
| Willow River | May 12 | Oct 2 | 143 d | 4a |
| Wilmont | May 3 | Oct 4 | 154 d | 5a |
| Wilton | May 17 | Sep 26 | 132 d | 3b |
| Windom | Apr 30 | Oct 10 | 163 d | 5a |
| Winger | May 15 | Sep 26 | 134 d | 3b |
| Winnebago | Apr 27 | Oct 10 | 166 d | 5a |
| Winona | Apr 21 | Oct 19 | 181 d | 5a |
| Winsted | Apr 30 | Oct 10 | 163 d | 4b |
| Winthrop | Apr 24 | Oct 15 | 174 d | 4b |
| Winton | May 14 | Sep 29 | 138 d | 3b |
| Wirt | May 16 | Sep 26 | 133 d | 3b |
| Wolf Lake | May 4 | Oct 3 | 152 d | 3b |
| Wolverton | May 5 | Oct 3 | 151 d | 4a |
| Wood Lake | May 4 | Oct 1 | 150 d | 4b |
| Woodstock | May 7 | Sep 29 | 145 d | 4b |
| Worthington | May 3 | Oct 4 | 154 d | 5a |
| Wrenshall | Jun 1 | Sep 22 | 113 d | 4a |
| Wright | May 31 | Sep 18 | 110 d | 4a |
| Wykoff | May 14 | Sep 28 | 137 d | 4b |
| Wyoming | May 3 | Oct 5 | 155 d | 4b |