National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

CHEHALIS (CLSW1)

Lat: 46.61°NLon: 122.90833°WElev: 262.0ft.

NA

62°F

17°C

Humidity 40%
Wind Speed W 2 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 15 Oct 03:09 PM PDT
Extended Forecast for

5 Miles SSW Onalaska WA

  • Tonight

    Tonight: Areas of fog after 4am. Otherwise, mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear
    then Areas
    Fog

  • Thursday

    Thursday: Areas of fog before 10am. Otherwise, increasing clouds, with a high near 59. Calm wind.

    High: 59 °F

    Areas Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Rain likely, mainly after 11pm. Mostly cloudy, with a low around 44. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Rain Likely

  • Friday

    Friday: A 40 percent chance of rain before 11am. Cloudy through mid morning, then gradual clearing, with a high near 62. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 62 °F

    Chance Rain
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. Light and variable wind.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of rain after 11am. Mostly cloudy, with a high near 63.

    High: 63 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain. Low around 44. Chance of precipitation is 100%.

    Low: 44 °F

    Rain

  • Sunday

    Sunday: Rain before 11am, then showers after 11am. Cloudy, with a high near 57.

    High: 57 °F

    Rain

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Showers

Detailed Forecast

Tonight
Areas of fog after 4am. Otherwise, mostly clear, with a low around 35. Calm wind.
Thursday
Areas of fog before 10am. Otherwise, increasing clouds, with a high near 59. Calm wind.
Thursday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 44. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 40 percent chance of rain before 11am. Cloudy through mid morning, then gradual clearing, with a high near 62. Calm wind becoming west northwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 38. Light and variable wind.
Saturday
A 40 percent chance of rain after 11am. Mostly cloudy, with a high near 63.
Saturday Night
Rain. Low around 44. Chance of precipitation is 100%.
Sunday
Rain before 11am, then showers after 11am. Cloudy, with a high near 57.
Sunday Night
Showers and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 42.
Monday
A chance of showers, mainly before 11am. Partly sunny, with a high near 59.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 39.
Tuesday
A chance of rain. Mostly cloudy, with a high near 59.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 42.
Wednesday
A chance of rain. Mostly cloudy, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Onalaska WA
 46.5°N 122.74°W (Elev. 305 ft)
Last Update:
2:25 pm PDT Oct 15, 2025
Forecast Valid:
3pm PDT Oct 15, 2025-6pm PDT Oct 22, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation