Missouri frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Waldron | Apr 13 | Oct 24 | 194 d | 6b |
| Walker | Apr 7 | Oct 27 | 203 d | 6b |
| Walnut Grove | Apr 11 | Oct 24 | 196 d | 6b |
| Walnut Shade | Apr 6 | Oct 31 | 208 d | 7a |
| Wappapello | Apr 2 | Nov 2 | 214 d | 7a |
| Wardell | Mar 25 | Nov 7 | 227 d | 7b |
| Warrensburg | Apr 14 | Oct 21 | 190 d | 6b |
| Warrenton | Apr 14 | Oct 23 | 192 d | 6b |
| Warsaw | Apr 7 | Oct 30 | 206 d | 6b |
| Washburn | Apr 4 | Oct 30 | 209 d | 7a |
| Washington | Apr 8 | Oct 25 | 200 d | 6b |
| Wasola | Apr 10 | Oct 27 | 200 d | 7a |
| Watson | Apr 24 | Oct 10 | 169 d | 5b |
| Waverly | Apr 6 | Oct 30 | 207 d | 6b |
| Wayland | Apr 10 | Oct 27 | 200 d | 6a |
| Waynesville | Apr 15 | Oct 21 | 189 d | 6b |
| Weatherby | Apr 19 | Oct 19 | 183 d | 6a |
| Weaubleau | Apr 7 | Oct 28 | 204 d | 6b |
| Webb City | Apr 9 | Oct 27 | 201 d | 7a |
| Wellington | Apr 8 | Oct 25 | 200 d | 6a |
| Wellsville | Apr 11 | Oct 23 | 195 d | 6b |
| Wentworth | Apr 14 | Oct 21 | 190 d | 7a |
| Wentzville | Apr 10 | Oct 26 | 199 d | 6b |
| Wesco | Apr 26 | Oct 8 | 165 d | 6a |
| West Alton | Apr 4 | Nov 5 | 215 d | 7a |
| West Plains | Apr 16 | Oct 21 | 188 d | 7a |
| Westboro | Apr 19 | Oct 15 | 179 d | 5b |
| Weston | Apr 12 | Oct 27 | 198 d | 6a |
| Westphalia | Apr 10 | Oct 26 | 199 d | 6b |
| Wheatland | Apr 7 | Oct 28 | 204 d | 6b |
| Wheaton | Apr 9 | Oct 26 | 200 d | 7a |
| Wheeling | Apr 15 | Oct 21 | 189 d | 6a |
| Whiteman Air Force Base | Apr 14 | Oct 21 | 190 d | 6b |
| Whiteoak | Mar 31 | Nov 1 | 215 d | 7b |
| Whiteside | Apr 20 | Oct 20 | 183 d | 6b |
| Whitewater | Apr 12 | Oct 23 | 194 d | 7a |
| Willard | Apr 9 | Oct 27 | 201 d | 6b |
| Williamsburg | Apr 10 | Oct 24 | 197 d | 6b |
| Williamstown | Apr 11 | Oct 23 | 195 d | 6a |
| Williamsville | Apr 2 | Nov 2 | 214 d | 7a |
| Willow Springs | Apr 8 | Oct 25 | 200 d | 7a |
| Windsor | Apr 7 | Oct 28 | 204 d | 6b |
| Windyville | Apr 23 | Oct 15 | 175 d | 6b |
| Winfield | Apr 20 | Oct 20 | 183 d | 6b |
| Winigan | Apr 15 | Oct 20 | 188 d | 6a |
| Winona | Apr 22 | Oct 18 | 179 d | 6b |
| Winston | Apr 15 | Oct 24 | 192 d | 6a |
| Wolf Island | Apr 6 | Oct 30 | 207 d | 7b |
| Wooldridge | Apr 12 | Oct 25 | 196 d | 6b |
| Worth | Apr 20 | Oct 19 | 182 d | 5b |
| Worthington | Apr 26 | Oct 14 | 171 d | 6a |
| Wright City | Apr 14 | Oct 23 | 192 d | 6b |
| Wyaconda | Apr 23 | Oct 17 | 177 d | 6a |
| Wyatt | Apr 2 | Oct 31 | 212 d | 7b |