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

37°F

3°C

Humidity 100%
Wind Speed E 0 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 19 Nov 07:09 AM PST
Extended Forecast for

5 Miles SSW Onalaska WA

  • Today

    Today: Areas of fog before noon. Otherwise, partly sunny, with a high near 52. Calm wind.

    High: 52 °F

    Areas Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Rain. Patchy fog after 1am. Low around 40. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance Rain
    then Rain and
    Patchy Fog

  • Thursday

    Thursday: Rain likely, mainly before 10am. Patchy fog before 1pm, then patchy fog after 4pm. Otherwise, partly sunny, with a high near 52. Light south wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Rain Likely
    and Patchy
    Fog

  • Thursday Night

    Thursday Night: A 30 percent chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Chance Rain
    and Patchy
    Fog

  • Friday

    Friday: Rain likely, mainly after 4pm. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 51. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Rain Likely
    and Patchy
    Fog

  • Friday Night

    Friday Night: Rain likely, mainly before 10pm. Patchy fog. Otherwise, cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Rain Likely
    and Patchy
    Fog

  • Saturday

    Saturday: Rain likely. Patchy fog. Otherwise, cloudy, with a high near 54. Chance of precipitation is 60%.

    High: 54 °F

    Rain Likely
    and Patchy
    Fog

  • Saturday Night

    Saturday Night: Rain likely, mainly before 10pm. Patchy fog. Otherwise, cloudy, with a low around 42.

    Low: 42 °F

    Rain Likely
    and Patchy
    Fog

  • Sunday

    Sunday: Rain likely. Patchy fog before 1pm, then patchy fog after 2pm. Otherwise, cloudy, with a high near 54.

    High: 54 °F

    Rain Likely
    and Patchy
    Fog

Detailed Forecast

Today
Areas of fog before noon. Otherwise, partly sunny, with a high near 52. Calm wind.
Tonight
Rain. Patchy fog after 1am. Low around 40. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain likely, mainly before 10am. Patchy fog before 1pm, then patchy fog after 4pm. Otherwise, partly sunny, with a high near 52. Light south wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 30 percent chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 37. Calm wind.
Friday
Rain likely, mainly after 4pm. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 51. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain likely, mainly before 10pm. Patchy fog. Otherwise, cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely. Patchy fog. Otherwise, cloudy, with a high near 54. Chance of precipitation is 60%.
Saturday Night
Rain likely, mainly before 10pm. Patchy fog. Otherwise, cloudy, with a low around 42.
Sunday
Rain likely. Patchy fog before 1pm, then patchy fog after 2pm. Otherwise, cloudy, with a high near 54.
Sunday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 40.
Monday
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 50.
Monday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 33.
Tuesday
A chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 47.
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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:
7:01 am PST Nov 19, 2025
Forecast Valid:
7am PST Nov 19, 2025-6pm PST Nov 25, 2025
 
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Additional Resources

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Chance of Precipitation