Chehalis, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chehalis, a city in Lewis County, Washington.
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. Northwest wind around 2 mph.
7-day forecast for Chehalis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 2 mph NW | 0% |
| Saturday | 77°F | Mostly Cloudy | 1 mph N | 0% |
| Saturday Night | 48°F | Partly Cloudy | 1 mph NNW | 0% |
| Sunday | 78°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 49°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Monday | 75°F | Partly Sunny | 0 to 5 mph NW | 0% |
| Monday Night | 49°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Tuesday | 72°F | Partly Sunny | 0 to 5 mph NW | 0% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Wednesday | 71°F | Partly Sunny | 2 mph N | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph N | 5% |
| Thursday | 73°F | Partly Sunny | 2 mph NNW | 11% |
| Thursday Night | 49°F | Slight Chance Light Rain | 2 mph NW | 24% |
| Friday | 68°F | Slight Chance Light Rain | 0 to 5 mph WSW | 17% |
Forecast source: National Weather Service (api.weather.gov) for Chehalis (46.664, -122.965). Updated through the day.
Growing snapshot for Chehalis
Last spring frost
Apr 22
First fall frost
Oct 27
Growing season
188 days
Hardiness zone
8a
More local growing data for Chehalis: nearby ZIP 98532 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Ashford
Centralia
Fords Prairie
Grand Mound
Morton
Mossyrock
Napavine
Onalaska
Packwood
Pe Ell
Toledo
Vader
Winlock
Climate data from the nearest NOAA station, Centralia, Wa (8 mi from Chehalis). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.