Chehalis, WA Weather & Growing Conditions
Tonight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. Northwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Cloudy | 1 mph NW | 0% |
| Saturday | 77°F | Mostly Cloudy | 2 mph NNW | 0% |
| Saturday Night | 48°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 78°F | Mostly Sunny | 3 mph NW | 0% |
| Sunday Night | 49°F | Mostly Clear | 3 mph WNW | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 5 mph WNW | 0% |
| Monday Night | 49°F | Partly Cloudy | 1 to 5 mph WNW | 0% |
| Tuesday | 72°F | Partly Sunny | 0 to 5 mph NW | 0% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 5 mph WNW | 1% |
| Wednesday | 71°F | Partly Sunny | 2 mph N | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 2 mph N | 5% |
| Thursday | 73°F | Partly Sunny | 2 mph NNW | 11% |
| Thursday Night | 50°F | Slight Chance Light Rain | 2 mph W | 23% |
| Friday | 68°F | Slight Chance Light Rain | 1 to 5 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Chehalis, WA
Last spring frost
Apr 22
First fall frost
Oct 27
Growing season
188 days
Hardiness zone
8a
Explore more for Chehalis, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Centralia, Wa (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.