Oregon Frost Dates
Oregon ranges from a mild, moist coast to productive interior valleys and colder mountain or high desert regions. Frost is usually a minor issue near the coast, while inland basins and elevated country often see sharper seasonal edges and more persistent spring chill.
Look up your exact frost dates
Frost timing shifts across Oregon with elevation and distance from water. Enter your ZIP code for dates from your nearest weather station.
Oregon locations
| ZIP | Area | Hardiness zone |
|---|---|---|
| 97002 | Aurora | 8b |
| 97003 | Aloha | 9a |
| 97008 | Beaverton | 9a |
| 97201 | Portland | 8b |
| 97204 | Portland | 9a |
| 97205 | Portland | 8b |
| 97208 | Portland | 9a |
| 97209 | Portland | 9a |
| 97218 | Portland | 9a |
| 97220 | Maywood Park | 9a |
| 97258 | Portland | - |
| 97368 | Rose Lodge | 9a |
| 97423 | Coquille | 9a |
| 97436 | Elkton | 9a |
| 97801 | Pendleton | 7a |
| 97823 | Condon | 7a |
| 97838 | Hermiston | 7b |
| 97859 | Meacham | 6b |
| 97873 | Seneca | 5b |
| 99362 | Walla Walla | 7a |
| 97001 | Shaniko | 7a |
| 97004 | Beavercreek | 8b |
| 97005 | Beaverton | 9a |
| 97006 | Beaverton | 8b |
| 97007 | Beaverton | 8b |
| 97009 | Boring | 8b |
| 97011 | Mount Hood Villages | 8a |
| 97013 | Canby | 8b |
| 97014 | Cascade Locks | 8a |
| 97015 | Happy Valley | 9a |
| 97016 | Clatskanie | 8b |
| 97017 | Beavercreek | 8b |
| 97018 | Columbia City | 8b |
| 97019 | Sandy | 8b |
| 97020 | Donald | 8b |
| 97021 | Dufur | 7b |
| 97022 | Estacada | 8b |
| 97023 | Estacada | 8a |
| 97024 | Fairview | 9a |
| 97026 | Gervais | 8b |
| 97027 | Gladstone | 9a |
| 97028 | Rhododendron | 7a |
| 97029 | Grass Valley | 7a |
| 97030 | Gresham | 9a |
| 97031 | Odell | 7b |
| 97032 | Hubbard | 8b |
| 97033 | Grass Valley | 7a |
| 97034 | Lake Oswego | 9a |
| 97035 | Lake Oswego | 9a |
| 97037 | Maupin | 7a |
| 97038 | Molalla | 8b |
| 97039 | Moro | 7a |
| 97040 | Mosier | 7b |
| 97041 | Parkdale | 7b |
| 97042 | Mulino | 8b |
| 97045 | Beavercreek | 9a |
| 97048 | Rainier | 8b |
| 97049 | Mount Hood Villages | 7b |
| 97050 | Maryhill | 8a |
| 97051 | Warren | 8b |
Source: NOAA 1991–2020 U.S. Climate Normals (public domain) and USDA 2023 Plant Hardiness Zone Map. Page updated Aug 4, 2026.