Portland, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Multnomah County, Oregon.
Tonight
54°F
Mostly Clear
Mostly clear, with a low around 54. North northwest wind around 2 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Clear | 2 mph NNW | 0% |
| Saturday | 79°F | Patchy Fog then Partly Sunny | 1 to 5 mph NNW | 0% |
| Saturday Night | 55°F | Partly Cloudy | 5 mph NNW | 0% |
| Sunday | 82°F | Sunny | 2 to 6 mph NNW | 0% |
| Sunday Night | 56°F | Mostly Clear | 2 to 6 mph NNW | 0% |
| Monday | 77°F | Mostly Sunny | 2 to 7 mph NNW | 0% |
| Monday Night | 55°F | Partly Cloudy | 2 to 7 mph NNW | 0% |
| Tuesday | 73°F | Mostly Sunny | 2 to 6 mph NNW | 1% |
| Tuesday Night | 52°F | Partly Cloudy | 1 to 6 mph NNW | 1% |
| Wednesday | 73°F | Mostly Sunny | 3 mph N | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 3 mph N | 1% |
| Thursday | 76°F | Mostly Sunny | 3 mph N | 7% |
| Thursday Night | 55°F | Slight Chance Light Rain | 3 mph NW | 21% |
| Friday | 70°F | Slight Chance Light Rain then Partly Sunny | 2 to 6 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Portland (45.537, -122.650). Updated through the day.
Growing snapshot for Portland
Last spring frost
Feb 25
First fall frost
Dec 1
Growing season
280 days
Hardiness zone
8b
More local growing data for Portland: nearby ZIP 97212 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Portland Kgw-Tv, Or (2.9 mi from Portland). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.