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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

DW8787 CHEHALIS (D8787)

Lat: 46.64646°NLon: 122.8388°WElev: 550.0ft.

NA

50°F

10°C

Humidity 64%
Wind Speed WSW 1 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 38°F (3°C)
Visibility NA
Last update 21 Mar 06:15 PM PDT
Extended Forecast for

3 Miles S Onalaska WA

  • Tonight

    Tonight: Mostly clear, with a low around 31. Light and variable wind.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 53. Light and variable wind.

    High: 53 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 33. Light north wind.

    Low: 33 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 53. Calm wind.

    High: 53 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 50 percent chance of rain after 11pm. Cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. High near 52. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 52 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 37. Chance of precipitation is 90%.

    Low: 37 °F

    Rain then
    Rain Likely

  • Wednesday

    Wednesday: Rain. Mostly cloudy, with a high near 51.

    High: 51 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 31. Light and variable wind.
Sunday
Mostly sunny, with a high near 53. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around 33. Light north wind.
Monday
Mostly cloudy, with a high near 53. Calm wind.
Monday Night
A 50 percent chance of rain after 11pm. Cloudy, with a low around 41. Calm wind.
Tuesday
Rain. High near 52. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Low around 37. Chance of precipitation is 90%.
Wednesday
Rain. Mostly cloudy, with a high near 51.
Wednesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 33.
Thursday
A chance of rain. Partly sunny, with a high near 52.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 34.
Saturday
A slight chance of rain. Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Onalaska WA
 46.54°N 122.72°W (Elev. 528 ft)
Last Update:
2:01 pm PDT Mar 21, 2026
Forecast Valid:
6pm PDT Mar 21, 2026-6pm PDT Mar 28, 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