Chehalis, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chehalis, a city in Lewis County, Washington.
Today
58°F
Patchy Fog then Light Rain
Patchy fog before 7am, then rain. Mostly cloudy. High near 58, with temperatures falling to around 54 in the afternoon. South southeast wind 1 to 9 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Chehalis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 58°F | Patchy Fog then Light Rain | 1 to 9 mph SSE | 77% |
| Tonight | 44°F | Light Rain | 6 to 13 mph S | 90% |
| Thursday | 58°F | Partly Sunny | 5 to 9 mph S | 12% |
| Thursday Night | 43°F | Mostly Cloudy then Light Rain Likely | 2 to 9 mph SE | 73% |
| Friday | 56°F | Light Rain | 6 to 16 mph SSE | 80% |
| Friday Night | 46°F | Light Rain Likely | 1 to 6 mph SSE | 66% |
| Saturday | 64°F | Mostly Cloudy then Chance Light Rain | 1 to 6 mph SSE | 35% |
| Saturday Night | 49°F | Light Rain | 6 to 15 mph S | 83% |
| Sunday | 58°F | Chance Light Rain | 0 to 9 mph SW | 54% |
| Sunday Night | 40°F | Mostly Cloudy then Slight Chance Light Rain | 0 mph | 15% |
| Monday | 58°F | Chance Light Rain | 0 to 3 mph SE | 39% |
| Monday Night | 45°F | Chance Light Rain | 3 to 10 mph SSE | 54% |
| Tuesday | 59°F | Chance Light Rain | 5 to 15 mph SSE | 54% |
| Tuesday Night | 46°F | Chance Light Rain | 5 to 8 mph SSE | 50% |
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.