| NWS Forecast for: Middle Chehalis River Valley Issued by: National Weather Service Seattle, WA Last Update: 342 AM PDT Mon Oct 5 2026 |  |
| Today: Mostly cloudy. Areas of fog in the morning. Highs in the upper 60s to mid 70s. Light wind. Tonight: Mostly cloudy. Patchy fog late in the evening. Areas of fog after midnight. Lows in the lower 50s. Light wind. Tuesday: Mostly cloudy in the morning then becoming mostly sunny. Areas of fog in the morning. Highs in the upper 60s to mid 70s. Light wind. Tuesday Night: Mostly clear. Lows in the mid to upper 40s. Light wind. Wednesday: Sunny. Highs in the 70s. Light wind. Wednesday Night: Clear. Lows in the mid to upper 40s. Thursday: Sunny. Highs in the mid 70s to lower 80s. Thursday Night: Partly cloudy. Lows near 50. Friday: Partly sunny. A slight chance of rain in the afternoon. Highs in the mid to upper 60s. Friday Night: Mostly cloudy. Lows in the lower to mid 40s. Saturday: Mostly sunny. Highs in the lower to mid 60s. Saturday Night: Mostly clear. Lows near 40. Sunday: Sunny. Highs in the mid 60s. | |
| Zone Forecast: Middle Chehalis River Valley | |
Visit your local NWS office at: https://www.weather.gov/sew |