Chehalis, WA Weather & Growing Conditions
Tonight
37°F
Mostly Clear then Patchy Fog
Patchy fog after 2am. Mostly clear, with a low around 37. Southeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Mostly Clear then Patchy Fog | 1 mph SE | 3% |
| Wednesday | 59°F | Patchy Fog then Light Rain Likely | 1 to 6 mph SE | 60% |
| Wednesday Night | 45°F | Light Rain | 2 to 8 mph S | 99% |
| Thursday | 58°F | Slight Chance Light Rain then Partly Sunny | 5 mph S | 17% |
| Thursday Night | 45°F | Light Rain | 1 to 8 mph SSE | 78% |
| Friday | 57°F | Light Rain | 3 to 12 mph SSE | 78% |
| Friday Night | 45°F | Chance Light Rain | 3 mph SSE | 36% |
| Saturday | 63°F | Chance Light Rain | 5 mph SSE | 35% |
| Saturday Night | 49°F | Light Rain | 5 to 16 mph S | 75% |
| Sunday | 58°F | Light Rain Likely | 0 to 10 mph SW | 65% |
| Sunday Night | 42°F | Slight Chance Light Rain | 1 mph SE | 24% |
| Monday | 57°F | Chance Light Rain | 1 to 6 mph SE | 51% |
| Monday Night | 46°F | Light Rain Likely | 3 to 13 mph SSE | 68% |
| Tuesday | 59°F | Light Rain Likely | 5 to 14 mph SSE | 68% |
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 Nov 4, 2026.