Chehalis, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chehalis, a city in Lewis County, Washington.
Tonight
36°F
Patchy Fog
Patchy fog after 10pm. Partly cloudy, with a low around 36. East wind around 1 mph.
7-day forecast for Chehalis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 36°F | Patchy Fog | 1 mph E | 3% |
| Wednesday | 58°F | Patchy Fog then Chance Light Rain | 1 to 7 mph SSE | 54% |
| Wednesday Night | 45°F | Light Rain | 2 to 8 mph S | 99% |
| Thursday | 58°F | Slight Chance Light Rain then Partly Sunny | 2 to 6 mph S | 19% |
| Thursday Night | 45°F | Light Rain | 0 to 7 mph SSE | 78% |
| Friday | 57°F | Light Rain | 3 to 13 mph SSE | 78% |
| Friday Night | 45°F | Chance Light Rain | 3 mph SSE | 37% |
| Saturday | 63°F | Chance Light Rain | 1 to 6 mph SSE | 34% |
| Saturday Night | 49°F | Light Rain Likely | 6 to 15 mph S | 74% |
| Sunday | 58°F | Light Rain Likely | 0 to 10 mph SW | 68% |
| Sunday Night | 42°F | Chance Light Rain | 0 mph | 25% |
| Monday | 57°F | Chance Light Rain | 0 to 6 mph SSE | 51% |
| Monday Night | 46°F | Light Rain Likely | 5 to 13 mph SSE | 67% |
| Tuesday | 59°F | Light Rain Likely | 6 to 16 mph SSE | 67% |
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 Nov 4, 2026.