Colorado frost dates: L
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| La Jara | May 28 | Sep 21 | 116 d | 5b |
| La Junta | May 1 | Oct 8 | 160 d | 6a |
| La Salle | May 2 | Oct 8 | 159 d | 5a |
| La Veta | May 6 | Oct 4 | 151 d | 6a |
| Lafayette | May 2 | Oct 11 | 162 d | 6a |
| Lake City | Jun 8 | Sep 17 | 101 d | 5a |
| Lake George | Jun 2 | Sep 19 | 109 d | 5b |
| Lamar | Apr 30 | Oct 10 | 163 d | 6a |
| Laporte | May 2 | Oct 7 | 158 d | 5b |
| Larkspur | May 14 | Oct 1 | 140 d | 5b |
| Las Animas | Apr 29 | Oct 12 | 166 d | 6a |
| Lazear | May 3 | Oct 12 | 162 d | 6b |
| Leadville | frost any month | 5a | ||
| Lewis | May 15 | Oct 8 | 146 d | 6b |
| Limon | May 21 | Sep 26 | 128 d | 5b |
| Lindon | May 15 | Oct 2 | 140 d | 5b |
| Littleton | May 2 | Oct 11 | 162 d | 6a |
| Livermore | May 31 | Sep 19 | 111 d | 5b |
| Log Lane Village | May 6 | Oct 6 | 153 d | 5b |
| Loma | Apr 27 | Oct 11 | 167 d | 6b |
| Lone Tree | May 5 | Oct 8 | 156 d | 6a |
| Longmont | May 7 | Oct 5 | 151 d | 5b |
| Louisville | May 6 | Oct 5 | 152 d | 6a |
| Louviers | May 16 | Oct 1 | 138 d | 5b |
| Loveland | May 10 | Oct 1 | 144 d | 5b |
| Lucerne | May 2 | Oct 8 | 159 d | 5a |
| Lyons | Jun 14 | Sep 12 | 90 d | 5b |