Oregon frost dates
Median last spring frost and first fall frost for 374 places in Oregon. Last frost ranges from Feb 11 in Beaverton to Jun 11 in Arock.
Largest cities
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Portland | Feb 25 | Dec 1 | 279 d | 9a |
| Eugene | Apr 11 | Oct 23 | 195 d | 8b |
| Salem | Apr 3 | Nov 1 | 212 d | 8b |
| Gresham | Mar 16 | Nov 20 | 249 d | 8b |
| Hillsboro | Apr 16 | Oct 23 | 190 d | 8b |
| Beaverton | Feb 11 | Dec 5 | 297 d | 8b |
| Bend | Jun 6 | Sep 20 | 106 d | 6b |
| Medford | Apr 8 | Oct 29 | 204 d | 8b |
| Springfield | Apr 11 | Oct 23 | 195 d | 8b |
| Corvallis | Apr 17 | Oct 28 | 194 d | 8b |
| Albany | Apr 17 | Oct 28 | 194 d | 8b |
| Lake Oswego | Mar 18 | Nov 18 | 245 d | 9a |
| Keizer | Apr 3 | Nov 1 | 212 d | 8b |
| Grants Pass | Apr 8 | Oct 28 | 203 d | 8b |
| Oregon City | Mar 18 | Nov 18 | 245 d | 9a |
| Mcminnville | Apr 5 | Nov 7 | 216 d | 8b |
| Redmond | Jun 9 | Sep 14 | 97 d | 6b |
| Tualatin | Apr 1 | Nov 6 | 219 d | 9a |
| West Linn | Mar 18 | Nov 18 | 245 d | 9a |
| Woodburn | Mar 16 | Nov 14 | 243 d | 8b |
| Forest Grove | Apr 16 | Oct 26 | 193 d | 8b |
| Newberg | Mar 21 | Nov 22 | 246 d | 8b |
| Wilsonville | Mar 18 | Nov 13 | 240 d | 8b |
| Roseburg | Mar 23 | Nov 18 | 240 d | 8b |
| Klamath Falls | Jun 9 | Sep 18 | 101 d | 6b |
| Ashland | May 6 | Oct 8 | 155 d | 8a |
| Sherwood | Mar 21 | Nov 22 | 246 d | 8b |
| Happy Valley | Mar 18 | Nov 18 | 245 d | 8b |
| Central Point | Apr 8 | Oct 29 | 204 d | 8b |
| Canby | Mar 18 | Nov 13 | 240 d | 8b |
| Hermiston | Apr 27 | Oct 7 | 163 d | 7b |
| Pendleton | Apr 22 | Oct 9 | 170 d | 7a |
| Troutdale | Mar 26 | Nov 17 | 236 d | 9a |
| Lebanon | Mar 14 | Nov 18 | 249 d | 8b |
| Coos Bay | Mar 28 | Nov 6 | 223 d | 9a |
| The Dalles | Apr 14 | Oct 23 | 192 d | 7b |
| Dallas | Apr 16 | Nov 1 | 199 d | 8b |
| La Grande | May 6 | Oct 1 | 148 d | 6b |
| Saint Helens | Apr 18 | Nov 7 | 203 d | 8b |
| Cornelius | Apr 16 | Oct 26 | 193 d | 8b |