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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Seattle, Seattle-Tacoma International Airport (KSEA)

Lat: 47.44472°NLon: 122.31361°WElev: 427.0ft.

Partly Cloudy

61°F

16°C

Humidity 82%
Wind Speed SSW 5 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 27 Aug 11:00 PM PDT
Extended Forecast for

Des Moines WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 74. Calm wind becoming south southwest around 5 mph in the morning.

    High: 74 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Rain likely, mainly after 5am. Mostly cloudy, with a low around 54. West northwest wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Slight Chance
    Rain then
    Rain Likely

  • Saturday

    Saturday: A chance of rain before 11am, then a chance of showers and thunderstorms, mainly between 11am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 70. West southwest wind around 6 mph. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 52. South wind 3 to 5 mph.

    Low: 52 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 56. Calm wind.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 74. Calm wind becoming south southwest around 5 mph in the morning.
Friday Night
Rain likely, mainly after 5am. Mostly cloudy, with a low around 54. West northwest wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of rain before 11am, then a chance of showers and thunderstorms, mainly between 11am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 70. West southwest wind around 6 mph. Chance of precipitation is 50%.
Saturday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 52. South wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Partly sunny, with a high near 74.
Monday Night
Mostly cloudy, with a low around 54.
Tuesday
A slight chance of rain after 11am. Partly sunny, with a high near 69.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 54.
Wednesday
Rain likely. Mostly cloudy, with a high near 63.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 53.
Thursday
A chance of rain. Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Des Moines WA
 47.39°N 122.32°W (Elev. 75 ft)
Last Update:
11:26 pm PDT Aug 27, 2026
Forecast Valid:
11pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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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