Colorado frost dates: E
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Eads | Apr 30 | Oct 13 | 166 d | 6a |
| Eagle | frost any month | 5b | ||
| Eastlake | May 2 | Oct 11 | 162 d | 6a |
| Eaton | May 2 | Oct 8 | 159 d | 5a |
| Eckert | May 3 | Oct 9 | 159 d | 6b |
| Eckley | May 1 | Oct 12 | 164 d | 5b |
| Edwards | Jun 21 | Sep 7 | 78 d | 5b |
| Egnar | Jun 3 | Sep 25 | 114 d | 6b |
| Elbert | May 29 | Sep 21 | 115 d | 5b |
| Eldorado Springs | May 24 | Sep 23 | 122 d | 6a |
| Elizabeth | May 16 | Oct 2 | 139 d | 5b |
| Empire | May 30 | Sep 19 | 112 d | 5a |
| Englewood | May 2 | Oct 11 | 162 d | 6a |
| Erie | May 7 | Oct 5 | 151 d | 5b |
| Estes Park | frost any month | 5b | ||
| Estes Park (Larimer) | May 30 | Sep 17 | 110 d | 5a |
| Evans | May 2 | Oct 8 | 159 d | 5b |
| Evergreen | May 23 | Sep 22 | 122 d | 5b |