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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Walla Walla Regional Airport (KALW)

Lat: 46.09462°NLon: 118.2858°WElev: 1168.0ft.

Clear

81°F

27°C

Humidity 32%
Wind Speed N 0 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Aug 03:20 PM PDT
Extended Forecast for

Dayton WA

  • Tonight

    Tonight: A 20 percent chance of showers after 2am. Increasing clouds, with a low around 58. West wind around 6 mph becoming northeast in the evening.

    Low: 58 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 8am. Sunny, with a high near 87. West wind 5 to 9 mph.

    High: 87 °F

    Slight Chance
    Showers then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. West wind 6 to 8 mph becoming south in the evening.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. South wind around 8 mph becoming west in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. West wind 6 to 8 mph becoming south in the evening.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 57.

    Low: 57 °F

    Clear

Detailed Forecast

Tonight
A 20 percent chance of showers after 2am. Increasing clouds, with a low around 58. West wind around 6 mph becoming northeast in the evening.
Monday
A 20 percent chance of showers before 8am. Sunny, with a high near 87. West wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 57. West wind 6 to 8 mph becoming south in the evening.
Tuesday
Sunny, with a high near 89. South wind around 8 mph becoming west in the afternoon.
Tuesday Night
Mostly clear, with a low around 58. West wind 6 to 8 mph becoming south in the evening.
Wednesday
Sunny, with a high near 87.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 89.
Thursday Night
Clear, with a low around 57.
Friday
Sunny, with a high near 95.
Friday Night
Clear, with a low around 61.
Saturday
Sunny and hot, with a high near 98.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dayton WA
 46.32°N 117.98°W (Elev. 1768 ft)
Last Update:
3:30 pm PDT Aug 17, 2025
Forecast Valid:
3pm PDT Aug 17, 2025-6pm PDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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