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

46°F

8°C

Humidity 61%
Wind Speed NW 5 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 30 Nov 01:35 PM PST
Extended Forecast for

Mercer Island WA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 47. Calm wind.

    High: 47 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Partly Cloudy
    then Slight
    Chance Rain
    and Patchy
    Fog

  • Monday

    Monday: A slight chance of rain before 11am, then a chance of rain after 4pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 46. Calm wind. Chance of precipitation is 30%.

    High: 46 °F

    Chance Rain
    and Patchy
    Fog

  • Monday Night

    Monday Night: Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 41. Light south southeast wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain Likely

  • Tuesday

    Tuesday: A 50 percent chance of rain before 10am. Mostly cloudy, with a high near 47. Calm wind.

    High: 47 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 45.

    High: 45 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of rain. Cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 47. Calm wind.
Tonight
A 20 percent chance of rain after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 36. Calm wind.
Monday
A slight chance of rain before 11am, then a chance of rain after 4pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 46. Calm wind. Chance of precipitation is 30%.
Monday Night
Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 41. Light south southeast wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 50 percent chance of rain before 10am. Mostly cloudy, with a high near 47. Calm wind.
Tuesday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 37.
Wednesday
Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 39.
Thursday
A chance of rain. Cloudy, with a high near 47.
Thursday Night
Rain likely. Cloudy, with a low around 43.
Friday
Rain. Cloudy, with a high near 52.
Friday Night
Rain. Cloudy, with a low around 47.
Saturday
Rain. Mostly cloudy, with a high near 52.
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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:
1:25 pm PST Nov 30, 2025
Forecast Valid:
1pm PST Nov 30, 2025-6pm PST Dec 6, 2025
 
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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