Frost Dates & Planting Calendars in Oregon
Typical last spring frost, first fall frost, and growing-season length for 69 cities in Oregon, based on NOAA 1991–2020 climate normals. Click a city for its full frost-date summary, monthly temperature chart, and 42-crop planting calendar.
| City | Last Spring Frost (typical) | First Fall Frost (typical) | Growing Season | USDA Zone |
|---|---|---|---|---|
| Portland | February 25 | December 1 | 280 days | 9a |
| Eugene | April 11 | October 23 | 196 days | 8b |
| Salem | April 3 | November 1 | 212 days | 8b |
| Gresham | March 16 | November 20 | 250 days | 9a |
| Hillsboro | April 16 | October 23 | 191 days | 8b |
| Beaverton | February 11 | December 5 | 303 days | 9a |
| Bend | June 6 | September 20 | 105 days | 6b |
| Medford | April 8 | October 29 | 204 days | 8b |
| Springfield | April 11 | October 23 | 196 days | 8b |
| Corvallis | April 17 | October 28 | 194 days | 8b |
| Albany | April 17 | October 28 | 194 days | 8b |
| Tigard | April 1 | November 6 | 222 days | 9a |
| Aloha | February 11 | December 5 | 303 days | 8b |
| Lake Oswego | March 18 | November 18 | 244 days | 9a |
| Keizer | April 3 | November 1 | 212 days | 8b |
| Grants Pass | April 8 | October 28 | 201 days | 8b |
| Oregon City | March 18 | November 18 | 244 days | 9a |
| McMinnville | April 5 | November 7 | 216 days | 8b |
| Redmond | June 9 | September 14 | 98 days | 6b |
| Tualatin | April 1 | November 6 | 222 days | 9a |
| West Linn | March 18 | November 18 | 244 days | 9a |
| Woodburn | March 16 | November 14 | 242 days | 8b |
| Forest Grove | April 16 | October 26 | 192 days | 8b |
| Newberg | March 21 | November 22 | 241 days | 8b |
| Wilsonville | March 18 | November 13 | 243 days | 8b |
| Roseburg | March 23 | November 18 | 237 days | 8b |
| Klamath Falls | June 9 | September 18 | 99 days | 6b |
| Ashland | May 6 | October 8 | 154 days | 8a |
| Milwaukie | February 25 | December 1 | 280 days | 9a |
| Bethany | April 16 | October 23 | 191 days | 8b |
| Lents | March 13 | November 22 | 251 days | 9a |
| Hayesville | April 3 | November 1 | 212 days | 8b |
| Sherwood | March 21 | November 22 | 241 days | 8b |
| Altamont | June 9 | September 18 | 99 days | 6b |
| Happy Valley | March 18 | November 18 | 244 days | 8b |
| Central Point | April 8 | October 29 | 204 days | 8b |
| Canby | March 18 | November 13 | 243 days | 8b |
| Hermiston | April 26 | October 10 | 167 days | 7b |
| Pendleton | April 22 | October 9 | 170 days | 7a |
| Troutdale | March 26 | November 17 | 237 days | 9a |
| Oak Grove | March 18 | November 18 | 244 days | 9a |
| Lebanon | March 14 | November 18 | 248 days | 8b |
| Coos Bay | February 21 | December 9 | 294 days | 9a |
| Four Corners | April 3 | November 1 | 212 days | 8b |
| The Dalles | April 14 | October 23 | 191 days | 7b |
| Dallas | April 16 | November 1 | 199 days | 8b |
| Cedar Mill | February 11 | December 5 | 303 days | 8b |
| Oatfield | March 18 | November 18 | 244 days | 9a |
| La Grande | May 6 | October 1 | 146 days | 6b |
| Saint Helens | April 18 | November 7 | 201 days | 8b |
| Agate Beach | March 12 | December 10 | 271 days | 9b |
| Cornelius | April 16 | October 26 | 192 days | 8b |
| Gladstone | March 18 | November 18 | 244 days | 9a |
| Oak Hills | February 11 | December 5 | 303 days | 8b |
| Ontario | April 22 | October 9 | 168 days | 7a |
| Damascus | March 18 | November 18 | 244 days | 8b |
| Sandy | March 27 | November 18 | 239 days | 8b |
| Newport | March 21 | November 27 | 252 days | 9b |
| Monmouth | April 16 | November 1 | 199 days | 8b |
| Cottage Grove | April 24 | October 25 | 183 days | 8b |
| Silverton | March 28 | November 10 | 227 days | 8b |
| Baker City | May 25 | September 15 | 111 days | 6b |
| North Bend | February 21 | December 9 | 294 days | 9a |
| Astoria | March 26 | November 11 | 232 days | 8b |
| Prineville | June 1 | September 22 | 113 days | 6b |
| Rockcreek | April 16 | October 23 | 191 days | 8b |
| Fairview | March 16 | November 20 | 250 days | 9a |
| Sweet Home | April 12 | October 28 | 197 days | 8b |
| Independence | April 16 | November 1 | 199 days | 8b |