Oregon frost dates: L
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| La Grande | May 6 | Oct 1 | 148 d | 6b |
| La Pine | Jun 7 | Sep 18 | 103 d | 6b |
| Lafayette | Apr 5 | Nov 7 | 216 d | 8b |
| Lake Oswego | Mar 18 | Nov 18 | 245 d | 9a |
| Lakeside | Mar 25 | Nov 24 | 244 d | 9a |
| Lakeview | Jun 4 | Sep 17 | 105 d | 6b |
| Langlois | Mar 16 | Nov 29 | 258 d | 9a |
| Lebanon | Mar 14 | Nov 18 | 249 d | 8b |
| Lexington | Apr 26 | Oct 19 | 176 d | 7a |
| Lincoln City | Apr 4 | Nov 16 | 226 d | 9a |
| Logsden | Mar 12 | Dec 10 | 273 d | 9a |
| Long Creek | Jun 5 | Sep 14 | 101 d | 6b |
| Lorane | Apr 24 | Oct 25 | 184 d | 8b |
| Lostine | Jun 7 | Sep 9 | 94 d | 6a |
| Lowell | Mar 7 | Nov 27 | 265 d | 9a |
| Lyons | Apr 30 | Oct 22 | 175 d | 8b |