Oregon frost dates by city
| City | Last frost (50%) | Safer date (10%) | First frost (50%) | Season |
|---|---|---|---|---|
| Eugene | Apr 11 | May 9 | Oct 23 | 196 days |
| Medford | Apr 8 | Apr 30 | Oct 29 | 204 days |
| Portland | Mar 13 | Apr 1 | Nov 19 | 247 days |
Each city uses its nearest major NOAA weather station, usually the airport. Valleys, hilltops and rural spots can differ from it by one to three weeks. How to read these dates.