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.

Overcast

52°F

11°C

Humidity 86%
Wind Speed S 14 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 23 Nov 01:53 AM PST
Extended Forecast for

Mercer Island WA

  • Overnight

    Overnight: Rain. Steady temperature around 52. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 52 °F

    Rain

  • Sunday

    Sunday: Rain, mainly before 9am. Temperature falling to around 48 by 5pm. South wind 5 to 7 mph becoming northeast in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F⇓

    Rain then
    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: A 40 percent chance of rain before 3am. Cloudy, then gradually becoming partly cloudy, with a low around 42. South wind 3 to 6 mph.

    Low: 42 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly before 4pm. Mostly cloudy, with a high near 48. South wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain before 10pm. Mostly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 46. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Chance Rain
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain. Low around 43. Chance of precipitation is 80%.

    Low: 43 °F

    Rain

  • Wednesday

    Wednesday: Rain. Cloudy, with a high near 51.

    High: 51 °F

    Rain

  • Wednesday Night

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

    Low: 48 °F

    Rain

Detailed Forecast

Overnight
Rain. Steady temperature around 52. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain, mainly before 9am. Temperature falling to around 48 by 5pm. South wind 5 to 7 mph becoming northeast in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A 40 percent chance of rain before 3am. Cloudy, then gradually becoming partly cloudy, with a low around 42. South wind 3 to 6 mph.
Monday
Rain likely, mainly before 4pm. Mostly cloudy, with a high near 48. South wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 30 percent chance of rain before 10pm. Mostly cloudy, with a low around 40. Calm wind.
Tuesday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 46. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain. Low around 43. Chance of precipitation is 80%.
Wednesday
Rain. Cloudy, with a high near 51.
Wednesday Night
Rain. Mostly cloudy, with a low around 48.
Thanksgiving Day
Rain. Mostly cloudy, with a high near 52.
Thursday Night
Rain likely. Mostly cloudy, with a low around 47.
Friday
Rain likely. Mostly cloudy, with a high near 51.
Friday Night
A chance of rain. Mostly cloudy, with a low around 42.
Saturday
A chance of rain. Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.25°W (Elev. 105 ft)
Last Update:
1:25 am PST Nov 23, 2025
Forecast Valid:
2am PST Nov 23, 2025-6pm PST Nov 29, 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