Last and first frost dates are 30% probability, calculated using 1991-2020 Climate Normals from NOAA. Local information obtained at: https://www.almanac.com/gardening/frostdates.
Using a 30% probability threshold, means there’s about a 3 in 10 chance frost will occur before or after the given date. In general, it should be safe to plant after this date. Tender plants may need to be planted later when the soil is warmer. Because microclimates vary—your backyard might be warmer or cooler than nearby towns—use these dates as a flexible guide, not a guarantee.
| Location | Climate Station | Last Spring Frost | First Fall Frost | Growing Season |
| Depoe Bay | NEWPORT 3N | Mar-28 | Nov-26 | 242 days |
| Eddyville | ALSEA FH (FALL CREEK) | Apr-23 | Oct-24 | 183 days |
| Harlan | ALSEA FH (FALL CREEK) | Apr-23 | Oct-24 | 183 days |
| Lincoln City | OTIS 2 NE | Apr-18 | Nov-8 | 203 days |
| Logsden | NEWPORT 3N | Mar-28 | Nov-26 | 242 days |
| Neskowin | OTIS 2 NE | Apr-26 | Nov-26 | 203 days |
| Newport & South Beach | NEWPORT | Apr-1 | Nov-15 | 227 days |
| Otis | OTIS 2 NE | Apr-18 | Nov-8 | 203 days |
| Otter Rock | NEWPORT 3N | Mar-28 | Nov-26 | 242 days |
| Seal Rock | NEWPORT 1 SE | Feb-26 | Dec-4 | 278 days |
| Siletz | NEWPORT 3N | Mar-28 | Nov-26 | 242 days |
| Tidewater | ALSEA FH (FALL CREEK) | Apr-23 | Oct-24 | 183 days |
| Toledo | NEWPORT 1 SE | Feb-28 | Dec-4 | 278 days |
| Waldport | YACHATS, OR | Mar-2 | Dec-1 | 273 days |
| Yachats | YACHATS, OR | Mar-2 | Dec-1 | 273 days |
Featured Image by Alfons Landsmann from Pixabay.