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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

SEATTLE WEATHER FORECAST OFFICE (SEAW1)

Lat: 47.68528°NLon: 122.25111°WElev: 29.0ft.

NA

64°F

18°C

Humidity 78%
Wind Speed S 2 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 57°F (14°C)
Visibility NA
Last update 19 Sep 06:30 PM PDT
Extended Forecast for

Mountlake Terrace WA

  • Tonight

    Tonight: Mostly clear, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 70. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51. North northwest wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 70. Light north northwest wind.

    High: 70 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. North northwest wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 68.

    High: 68 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 51. Calm wind.
Sunday
Mostly sunny, with a high near 70. Calm wind becoming north northwest around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 51. North northwest wind around 5 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 70. Light north northwest wind.
Monday Night
Partly cloudy, with a low around 53. North northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 68.
Tuesday Night
Mostly cloudy, with a low around 51.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Mostly cloudy, with a high near 62.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 50.
Friday
A slight chance of rain. Mostly cloudy, with a high near 62.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountlake Terrace WA
 47.78°N 122.31°W (Elev. 374 ft)
Last Update:
12:55 pm PDT Sep 19, 2026
Forecast Valid:
8pm PDT Sep 19, 2026-6pm PDT Sep 26, 2026
 
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Additional Resources

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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