Portland, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Multnomah County, Oregon.
Tonight
42°F
Mostly Clear then Patchy Fog
Patchy fog after 3am. Mostly clear, with a low around 42. East southeast wind around 1 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Mostly Clear then Patchy Fog | 1 mph ESE | 2% |
| Wednesday | 58°F | Patchy Fog then Light Rain Likely | 2 mph SSE | 64% |
| Wednesday Night | 48°F | Light Rain | 2 to 6 mph S | 87% |
| Thursday | 59°F | Mostly Sunny | 2 mph SSW | 8% |
| Thursday Night | 45°F | Patchy Fog then Slight Chance Light Rain | 1 mph ENE | 15% |
| Friday | 58°F | Chance Light Rain | 2 mph SSE | 32% |
| Friday Night | 47°F | Chance Light Rain then Mostly Cloudy | 1 mph SE | 32% |
| Saturday | 63°F | Partly Sunny then Slight Chance Light Rain | 2 mph SE | 19% |
| Saturday Night | 50°F | Light Rain | 2 to 9 mph S | 76% |
| Sunday | 57°F | Chance Light Rain | 1 to 7 mph SSW | 46% |
| Sunday Night | 45°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph ENE | 15% |
| Monday | 57°F | Chance Light Rain | 2 mph ESE | 31% |
| Monday Night | 47°F | Chance Light Rain | 1 to 5 mph SSE | 38% |
| Tuesday | 59°F | Chance Light Rain | 5 mph S | 40% |
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 Nov 4, 2026.