Oregon frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Waldport | Feb 19 | Dec 11 | 295 d | 9a |
| Wallowa | Jun 7 | Sep 9 | 94 d | 6b |
| Walterville | Apr 3 | Nov 11 | 222 d | 8b |
| Walton | Apr 18 | Oct 25 | 190 d | 8b |
| Warm Springs | May 5 | Oct 7 | 155 d | 7a |
| Warren | Apr 18 | Nov 7 | 203 d | 8b |
| Warrenton | Mar 26 | Nov 11 | 230 d | 9a |
| Wasco | May 12 | Oct 4 | 145 d | 7b |
| Wedderburn | Feb 17 | Dec 3 | 289 d | 9b |
| Welches | May 27 | Oct 9 | 135 d | 8a |
| West Linn | Mar 18 | Nov 18 | 245 d | 9a |
| Westfall | May 7 | Oct 3 | 149 d | 6a |
| Westfir | Apr 24 | Oct 24 | 183 d | 8b |
| Westlake | Mar 28 | Nov 22 | 239 d | 9a |
| Weston | Mar 25 | Oct 29 | 218 d | 7a |
| Wheeler | Apr 22 | Oct 21 | 182 d | 9a |
| White City | Apr 8 | Oct 29 | 204 d | 8b |
| Wilbur | Mar 31 | Nov 5 | 219 d | 8b |
| Wilderville | Apr 8 | Oct 28 | 203 d | 8b |
| Willamina | May 20 | Oct 23 | 156 d | 8b |
| Williams | May 4 | Oct 13 | 162 d | 8b |
| Wilsonville | Mar 18 | Nov 13 | 240 d | 8b |
| Winchester | Mar 31 | Nov 5 | 219 d | 8b |
| Winston | Mar 23 | Nov 18 | 240 d | 9a |
| Wolf Creek | May 16 | Oct 30 | 167 d | 8b |
| Woodburn | Mar 16 | Nov 14 | 243 d | 8b |