Colorado frost dates: T
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Tabernash | frost any month | 5b | ||
| Telluride | frost any month | 5b | ||
| Thornton | May 2 | Oct 11 | 162 d | 6a |
| Timnath | May 3 | Oct 6 | 156 d | 5b |
| Toponas | Jun 14 | Sep 11 | 89 d | 5a |
| Towaoc | May 27 | Sep 28 | 124 d | 7a |
| Trinchera | May 21 | Sep 29 | 131 d | 6a |
| Trinidad | Apr 30 | Oct 15 | 168 d | 6a |
| Twin Lakes | Jun 16 | Sep 10 | 86 d | 5a |
| Two Buttes | Apr 30 | Oct 14 | 167 d | 6b |