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

Hazardous Weather Conditions

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Mist

47°F

8°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 45°F (7°C)
Visibility 4.00 mi
Last update 04 Dec 09:53 PM PST
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Rain. Low around 46. Calm wind becoming south southeast around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Rain

  • Friday

    Friday: Rain, mainly before noon. High near 56. South southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Rain. Low around 48. South southwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Rain

  • Saturday

    Saturday: Rain. High near 53. South southwest wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 47. South wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Sunday

    Sunday: Rain. High near 54. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 54 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.

    Low: 47 °F

    Rain Likely

  • Monday

    Monday: Rain, mainly after 10am. Cloudy, with a high near 55.

    High: 55 °F

    Rain

  • Monday Night

    Monday Night: Rain. Cloudy, with a low around 49.

    Low: 49 °F

    Rain

Detailed Forecast

Tonight
Rain. Low around 46. Calm wind becoming south southeast around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain, mainly before noon. High near 56. South southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 48. South southwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 53. 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. South wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 54. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Monday
Rain, mainly after 10am. Cloudy, with a high near 55.
Monday Night
Rain. Cloudy, with a low around 49.
Tuesday
Rain. Cloudy, with a high near 54.
Tuesday Night
Rain. Cloudy, with a low around 47.
Wednesday
Rain. Cloudy, with a high near 54.
Wednesday Night
Rain. Mostly cloudy, with a low around 47.
Thursday
Rain likely. Mostly cloudy, with a high near 53.
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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:
7:01 pm PST Dec 4, 2025
Forecast Valid:
10pm PST Dec 4, 2025-6pm PST Dec 11, 2025
 
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Additional Resources

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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