Duluth, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Duluth, a community in Clark County, Washington.
Tonight
52°F
Mostly Clear
Mostly clear, with a low around 52. Northwest wind around 3 mph.
7-day forecast for Duluth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 3 mph NW | 0% |
| Saturday | 78°F | Partly Sunny | 2 to 6 mph NW | 0% |
| Saturday Night | 53°F | Partly Cloudy | 6 mph NNW | 0% |
| Sunday | 81°F | Sunny | 3 to 9 mph NNW | 0% |
| Sunday Night | 53°F | Mostly Clear | 6 to 9 mph NW | 0% |
| Monday | 75°F | Mostly Sunny | 3 to 10 mph NW | 0% |
| Monday Night | 53°F | Partly Cloudy | 3 to 10 mph NW | 0% |
| Tuesday | 72°F | Mostly Sunny | 2 to 9 mph NW | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 2 to 9 mph NNW | 1% |
| Wednesday | 72°F | Mostly Sunny | 1 to 6 mph N | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 2 to 6 mph NNW | 2% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph NNW | 9% |
| Thursday Night | 53°F | Slight Chance Light Rain | 6 mph NW | 21% |
| Friday | 69°F | Slight Chance Light Rain then Partly Sunny | 5 to 8 mph WNW | 18% |
Forecast source: National Weather Service (api.weather.gov) for Duluth (45.784, -122.647). Updated through the day.
Growing snapshot for Duluth
Last spring frost
Apr 10
First fall frost
Nov 2
Growing season
209 days
Hardiness zone
8b
More local growing data for Duluth: nearby ZIP 98642 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Scappoose Ind Ap, Or (8 mi from Duluth). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.