Cathlamet, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cathlamet, a town in Wahkiakum County, Washington.
Tonight
51°F
Mostly Cloudy then Patchy Fog
Patchy fog after midnight. Mostly cloudy, with a low around 51. North northwest wind around 2 mph.
7-day forecast for Cathlamet
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Cloudy then Patchy Fog | 2 mph NNW | 0% |
| Saturday | 71°F | Patchy Fog then Partly Sunny | 0 to 7 mph NNW | 0% |
| Saturday Night | 50°F | Partly Cloudy | 6 mph NNW | 1% |
| Sunday | 73°F | Mostly Sunny | 2 to 8 mph NW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 5 to 8 mph WNW | 0% |
| Monday | 70°F | Partly Sunny | 3 to 10 mph WNW | 0% |
| Monday Night | 52°F | Mostly Cloudy | 5 to 10 mph WNW | 0% |
| Tuesday | 67°F | Partly Sunny | 3 to 10 mph WNW | 0% |
| Tuesday Night | 50°F | Mostly Cloudy | 1 to 10 mph WNW | 1% |
| Wednesday | 66°F | Partly Sunny | 1 to 8 mph WNW | 2% |
| Wednesday Night | 50°F | Mostly Cloudy | 2 to 8 mph NW | 2% |
| Thursday | 66°F | Mostly Cloudy | 2 to 7 mph NNW | 13% |
| Thursday Night | 50°F | Mostly Cloudy | 7 mph NW | 13% |
| Friday | 65°F | Partly Sunny | 5 to 9 mph NW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Cathlamet (46.206, -123.384). Updated through the day.
Growing snapshot for Cathlamet
Last spring frost
Apr 24
First fall frost
Oct 24
Growing season
184 days
Hardiness zone
8b
More local growing data for Cathlamet: nearby ZIP 98612 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Clatskanie, Or (10.6 mi from Cathlamet). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.