Frost dates · Oregon
When is the first frost in Portland, Oregon?
In a typical year, Portland, Oregon’s first frost comes around November 19 and its last around March 13.
One year in ten the first frost comes as early as October 29, and nine years in ten it has arrived by December 10. One year in ten the last frost is over as early as February 22, and nine years in ten it is over by April 1. Portland, Oregon averages about 32 nights a year at 32°F or colder, with about 247 frost-free days in between in a typical year. The first frost here usually comes in about 5 days. That makes it the 19th latest first frost of the 117 cities we track where it freezes most years.
Last updated
No freeze in the forecast for the next 48 hours.
Portland freezes on about a month’s worth of nights a year and spends the rest of it being damp instead.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Frost dates, early, typical and late years
| Early year (1 in 10) | Typical | Late year (1 in 10) | |
|---|---|---|---|
| First frost | October 29 | November 19 | December 10 |
| Last frost | February 22 | March 13 | April 1 |
A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Cities with about the same first frost
- Atlanta, Georgia: first frost around November 20
- El Paso, Texas: first frost around November 20
- New York, New York: first frost around November 20
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00024229.