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.

Partly Cloudy

60°F

16°C

Humidity 69%
Wind Speed WNW 4 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 09 Oct 05:53 PM PDT
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 51. North northwest wind around 5 mph becoming light and variable.

    Low: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain. High near 63. South southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Rain

  • Friday Night

    Friday Night: Rain. Low around 51. South wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Rain

  • Saturday

    Saturday: Rain. High near 58. South southwest wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 49. South southwest wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain

  • Sunday

    Sunday: Rain. High near 57. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Low around 45. Chance of precipitation is 80%.

    Low: 45 °F

    Rain

  • Columbus Day

    Columbus Day: A chance of rain before 11am. Partly sunny, with a high near 58.

    High: 58 °F

    Chance Rain
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 51. North northwest wind around 5 mph becoming light and variable.
Friday
Rain. High near 63. South southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 51. South wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 58. South southwest wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Low around 49. South southwest 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 57. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain. Low around 45. Chance of precipitation is 80%.
Columbus Day
A chance of rain before 11am. Partly sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
A slight chance of rain. Mostly sunny, with a high near 62.
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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:
2:25 pm PDT Oct 9, 2025
Forecast Valid:
6pm PDT Oct 9, 2025-6pm PDT Oct 16, 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