Arizona frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Waddell | Jan 7 | Dec 24 | 351 d | 9b |
| Wellton | Jan 11 | Dec 21 | 344 d | 9b |
| Wenden | Mar 4 | Nov 23 | 264 d | 9a |
| White Mountain Lake | May 5 | Oct 15 | 163 d | 7a |
| Whiteriver | May 22 | Oct 6 | 137 d | 7a |
| Wickenburg | Mar 7 | Nov 20 | 258 d | 9a |
| Wikieup | Mar 19 | Nov 23 | 249 d | 9b |
| Willcox | Apr 9 | Oct 31 | 205 d | 8a |
| Williams | May 9 | Oct 19 | 163 d | 7a |
| Willow Beach | Jan 7 | Dec 29 | 356 d | 9b |
| Window Rock | May 29 | Sep 28 | 122 d | 6b |
| Winkelman | Mar 13 | Nov 19 | 251 d | 9a |
| Winslow | Apr 27 | Oct 18 | 174 d | 7a |
| Wittmann | Feb 5 | Dec 11 | 309 d | 9b |
| Woodruff | May 4 | Oct 16 | 165 d | 7a |