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

45°F

7°C

Humidity 93%
Wind Speed SE 6 MPH
Barometer 30.28 in (1025.4 mb)
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill42°F (6°C)
Last update 04 Dec 10:00 AM PST
Extended Forecast for

Mercer Island WA

  • Today

    Today: Rain, mainly before 2pm. High near 47. South wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Rain

  • Tonight

    Tonight: Rain. Temperature rising to around 49 by 4am. South wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F⇑

    Rain

  • Friday

    Friday: Rain. High near 55. South southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Rain

  • Friday Night

    Friday Night: Rain. Low around 47. South southwest wind 11 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Rain

  • Saturday

    Saturday: Rain. High near 52. South southwest wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 47. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Rain

  • Sunday

    Sunday: Rain. High near 55. Chance of precipitation is 100%.

    High: 55 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Rain

  • Monday

    Monday: Rain. Cloudy, with a high near 55.

    High: 55 °F

    Rain

Detailed Forecast

Today
Rain, mainly before 2pm. High near 47. South wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain. Temperature rising to around 49 by 4am. South wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 55. South southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 47. South southwest wind 11 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 52. South southwest wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Low around 47. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain. High near 55. Chance of precipitation is 100%.
Sunday Night
Rain. Mostly cloudy, with a low around 48.
Monday
Rain. Cloudy, with a high near 55.
Monday Night
Rain. Cloudy, with a low around 49.
Tuesday
Rain. Cloudy, with a high near 55.
Tuesday Night
Rain. Cloudy, with a low around 46.
Wednesday
Rain. Cloudy, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
7:00 am PST Dec 4, 2025
Forecast Valid:
10am PST Dec 4, 2025-6pm PST Dec 10, 2025
 
Forecast Discussion
 
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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