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

DW8787 CHEHALIS (D8787)

Lat: 46.64646°NLon: 122.8388°WElev: 564.0ft.

NA

35°F

2°C

Humidity 100%
Wind Speed NW 0 MPH
Barometer 30.25 in (1024.38 mb)
Dewpoint 35°F (2°C)
Visibility NA
Last update 30 Dec 02:15 PM PST
Extended Forecast for

4 Miles SSW Onalaska WA

  • This Afternoon

    This Afternoon: Patchy dense fog after 4pm. Otherwise, sunny, with a high near 44. Calm wind.

    High: 44 °F

    Patchy Dense
    Fog

  • Tonight

    Tonight: Patchy dense fog before 10pm. Otherwise, partly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Patchy Dense
    Fog then
    Partly Cloudy

  • Wednesday

    Wednesday: Patchy fog after 5pm. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 46. Calm wind.

    High: 46 °F

    Partly Sunny
    then Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Patchy fog before 10pm. Otherwise, increasing clouds, with a low around 31. Calm wind.

    Low: 31 °F

    Patchy Fog
    then Mostly
    Cloudy

  • New Year's Day

    New Year's Day: A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 45. Calm wind.

    High: 45 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain, mainly after 10pm. Low around 38. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Rain

  • Friday

    Friday: Rain. High near 50. Chance of precipitation is 90%.

    High: 50 °F

    Rain

  • Friday Night

    Friday Night: Rain. Cloudy, with a low around 40.

    Low: 40 °F

    Rain

  • Saturday

    Saturday: Rain. Cloudy, with a high near 48.

    High: 48 °F

    Rain

Detailed Forecast

This Afternoon
Patchy dense fog after 4pm. Otherwise, sunny, with a high near 44. Calm wind.
Tonight
Patchy dense fog before 10pm. Otherwise, partly cloudy, with a low around 30. Calm wind.
Wednesday
Patchy fog after 5pm. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 46. Calm wind.
Wednesday Night
Patchy fog before 10pm. Otherwise, increasing clouds, with a low around 31. Calm wind.
New Year's Day
A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 45. Calm wind.
Thursday Night
Rain, mainly after 10pm. Low around 38. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 50. Chance of precipitation is 90%.
Friday Night
Rain. Cloudy, with a low around 40.
Saturday
Rain. Cloudy, with a high near 48.
Saturday Night
Rain. Cloudy, with a low around 40.
Sunday
Rain likely. Mostly cloudy, with a high near 46.
Sunday Night
Rain likely. Mostly cloudy, with a low around 37.
Monday
Rain likely. Mostly cloudy, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Onalaska WA
 46.54°N 122.75°W (Elev. 535 ft)
Last Update:
1:25 pm PST Dec 30, 2025
Forecast Valid:
2pm PST Dec 30, 2025-6pm PST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation