Washington frost dates: D
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Dallesport | Apr 11 | Oct 26 | 198 d | 8a |
| Danville | May 30 | Sep 10 | 103 d | 6b |
| Darrington | Apr 16 | Oct 23 | 190 d | 8a |
| Davenport | Jun 6 | Sep 11 | 97 d | 6b |
| Dayton | Apr 28 | Oct 13 | 168 d | 7a |
| Deer Harbor | Mar 26 | Nov 10 | 229 d | 9a |
| Deer Park | May 22 | Sep 14 | 115 d | 6b |
| Deming | Apr 18 | Oct 18 | 183 d | 8a |
| Dixie | Mar 27 | Oct 31 | 218 d | 7a |
| Doty | Apr 22 | Oct 27 | 188 d | 8a |
| Dryden | May 10 | Sep 30 | 143 d | 7a |
| Dupont | Mar 11 | Nov 21 | 255 d | 8b |
| Duvall | Apr 17 | Oct 23 | 189 d | 8b |