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

Boeing Field - King County International Airport (KBFI)

Lat: 47.54548°NLon: 122.3147°WElev: 20.0ft.

light rain,mist

48°F

9°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Last update 27 Nov 04:35 PM PST
Extended Forecast for

Mercer Island WA

  • Thanksgiving Day

    Thanksgiving Day: Rain. High near 52. Light east wind. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Rain

  • Tonight

    Tonight: Rain, mainly before 4am. Low around 45. East wind around 5 mph becoming north after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Rain

  • Friday

    Friday: Sunny, with a high near 53. Light and variable wind becoming north northeast around 5 mph.

    High: 53 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40. Light northeast wind.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 49. Light east wind.

    High: 49 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

Detailed Forecast

Thanksgiving Day
Rain. High near 52. Light east wind. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain, mainly before 4am. Low around 45. East wind around 5 mph becoming north after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Sunny, with a high near 53. Light and variable wind becoming north northeast around 5 mph.
Friday Night
Mostly cloudy, with a low around 40. Light northeast wind.
Saturday
A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 49. Light east wind.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 48.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
A chance of rain. Mostly cloudy, with a high near 48.
Monday Night
Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 42.
Tuesday
A chance of rain. Mostly cloudy, with a high near 50.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 41.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 49.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 41.
Thursday
A chance of rain. Mostly cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.6°N 122.22°W (Elev. 3 ft)
Last Update:
1:25 pm PST Nov 27, 2025
Forecast Valid:
4pm PST Nov 27, 2025-6pm PST Dec 4, 2025
 
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Additional Resources

Radar & Satellite Image

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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