Oregon frost dates: T
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Talent | May 6 | Oct 8 | 155 d | 8a |
| Tangent | Apr 17 | Oct 28 | 194 d | 8b |
| Tenmile | Mar 23 | Nov 18 | 240 d | 9a |
| Terrebonne | Jun 9 | Sep 14 | 97 d | 6b |
| The Dalles | Apr 14 | Oct 23 | 192 d | 7b |
| Tidewater | Apr 13 | Nov 3 | 204 d | 9a |
| Tillamook | Apr 22 | Oct 21 | 182 d | 9a |
| Tiller | Apr 29 | Oct 17 | 171 d | 8b |
| Timber | May 8 | Oct 1 | 146 d | 8b |
| Toledo | Feb 19 | Dec 16 | 300 d | 9a |
| Tolovana Park | Apr 2 | Nov 12 | 224 d | 9a |
| Trail | Apr 29 | Oct 17 | 171 d | 8a |
| Troutdale | Mar 26 | Nov 17 | 236 d | 9a |
| Tualatin | Apr 1 | Nov 6 | 219 d | 9a |
| Turner | Apr 3 | Nov 1 | 212 d | 8b |
| Tygh Valley | May 12 | Oct 7 | 148 d | 7a |