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.

Clear

55°F

13°C

Humidity 76%
Wind Speed NW 4 MPH
Barometer 29.83 in (1010.16 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 08 Oct 10:15 PM PDT
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Showers likely, mainly after 2am. Increasing clouds, with a low around 50. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Partly Cloudy
    then Showers
    Likely

  • Thursday

    Thursday: Showers likely before 2pm, then a slight chance of showers after 3pm. Cloudy, with a high near 63. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 52. Light and variable wind.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: Showers. High near 62. Light and variable wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Showers

  • Friday Night

    Friday Night: Showers likely. Mostly cloudy, with a low around 50. South wind 3 to 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers. High near 59. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 59 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Showers

  • Sunday

    Sunday: Showers. Mostly cloudy, with a high near 56.

    High: 56 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers likely, mainly after 2am. Increasing clouds, with a low around 50. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers likely before 2pm, then a slight chance of showers after 3pm. Cloudy, with a high near 63. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 52. Light and variable wind.
Friday
Showers. High near 62. Light and variable wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers likely. Mostly cloudy, with a low around 50. South wind 3 to 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers. High near 59. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Showers. Low around 48. Chance of precipitation is 80%.
Sunday
Showers. Mostly cloudy, with a high near 56.
Sunday Night
Showers likely. Mostly cloudy, with a low around 44.
Columbus Day
A chance of showers. Partly sunny, with a high near 57.
Monday Night
A chance of showers. Partly cloudy, with a low around 43.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 59.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 44.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 61.
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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:
8:01 pm PDT Oct 8, 2025
Forecast Valid:
10pm PDT Oct 8, 2025-6pm PDT Oct 15, 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