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Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Current conditions at

DW8787 CHEHALIS (D8787)

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

NA

54°F

12°C

Humidity 81%
Wind Speed WSW 0 MPH
Barometer 30.25 in (1024.38 mb)
Dewpoint 48°F (9°C)
Visibility NA
Last update 18 May 08:45 PM PDT
Extended Forecast for

3 Miles SSW Onalaska WA

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 43. Light north wind.

    Low: 43 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 8am. Otherwise, mostly cloudy, with a high near 64. Light and variable wind.

    High: 64 °F

    Areas Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 45. Light northwest wind.

    Low: 45 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 68. Calm wind becoming north around 5 mph in the afternoon.

    High: 68 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 44. North wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 43. Light north wind.
Tuesday
Areas of fog before 8am. Otherwise, mostly cloudy, with a high near 64. Light and variable wind.
Tuesday Night
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 45. Light northwest wind.
Wednesday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 68. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 44. North wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 66.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 44.
Memorial Day
A chance of rain. Partly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Onalaska WA
 46.54°N 122.75°W (Elev. 535 ft)
Last Update:
11:27 am PDT May 18, 2026
Forecast Valid:
9pm PDT May 18, 2026-6pm PDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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