Portland, OR Weather & Growing Conditions
Tonight
54°F
Mostly Clear
Mostly clear, with a low around 54. North northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Clear | 2 mph NNW | 0% |
| Saturday | 80°F | Patchy Fog then Partly Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 55°F | Partly Cloudy | 5 mph NNW | 0% |
| Sunday | 83°F | Mostly Sunny | 2 to 7 mph NNW | 0% |
| Sunday Night | 56°F | Mostly Clear | 2 to 7 mph NNW | 0% |
| Monday | 78°F | Mostly Sunny | 2 to 8 mph NNW | 0% |
| Monday Night | 56°F | Partly Cloudy | 2 to 8 mph NNW | 0% |
| Tuesday | 74°F | Partly Sunny | 2 to 7 mph NNW | 1% |
| Tuesday Night | 53°F | Partly Cloudy | 1 to 7 mph NNW | 1% |
| Wednesday | 74°F | Mostly Sunny | 1 to 5 mph N | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 5 mph N | 1% |
| Thursday | 78°F | Mostly Sunny | 1 to 5 mph N | 8% |
| Thursday Night | 56°F | Slight Chance Light Rain | 5 mph NW | 20% |
| Friday | 71°F | Slight Chance Light Rain then Partly Sunny | 3 to 7 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, OR
Last spring frost
Mar 13
First fall frost
Nov 19
Growing season
247 days
Hardiness zone
9a
Explore more for Portland, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Portland Intl Ap, Or (1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.