| NWS Forecast for: Lower Chehalis River Valley Issued by: National Weather Service Seattle, WA Last Update: 236 PM PDT Tue Sep 8 2026 |  |
| Tonight: Mostly clear. Lows in the lower to mid 50s. Northwest wind to 10 mph in the evening becoming light. Wednesday: Mostly sunny. Highs in the mid 70s to lower 80s. Light wind becoming west to 10 mph in the afternoon. Wednesday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid to upper 50s. West wind around 10 mph. Gusts to 25 mph after midnight. Thursday: Mostly cloudy in the morning then becoming mostly sunny. Highs in the mid 60s to lower 70s. West wind 10 to 15 mph with gusts to 25 mph. Thursday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 40s to mid 50s. West wind 10 to 15 mph. Friday: Mostly cloudy. Highs in the lower to mid 60s. Friday Night: Mostly cloudy. A slight chance of rain after midnight. Lows near 50. Saturday: Mostly cloudy. A chance of rain in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon. Highs in the mid to upper 60s. Saturday Night: Mostly cloudy with a slight chance of rain in the evening, then partly cloudy after midnight. Lows in the lower 50s. Sunday: Partly sunny. Highs near 70. Sunday Night: Partly cloudy. Lows in the lower 50s. Monday: Mostly sunny. Highs near 70. Monday Night: Partly cloudy. Lows in the lower 50s. Tuesday: Partly sunny. Highs in the lower to mid 70s. | |
| Zone Forecast: Lower Chehalis River Valley | |
Visit your local NWS office at: https://www.weather.gov/sew |