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Hazardous Weather Conditions

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Overcast

57°F

14°C

Humidity 87%
Wind Speed S 12 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 54°F (12°C)
Visibility 9.00 mi
Last update 10 Dec 11:20 PM PST
Extended Forecast for

Mercer Island WA

Flood Watch December 10, 11:37pm until December 12, 04:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 10, 11:37pm until December 12, 04:00pm

    NOW until 4:00pm Fri

    Flood Watch

  • Tonight

    Low: 49 °F

    Rain

  • Thursday

    Thursday: Rain, mainly before 11am. High near 53. East wind around 5 mph becoming calm in the morning. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Rain then
    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 49. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Rain Likely

  • Friday

    Friday: A 40 percent chance of rain. Cloudy, with a high near 55. South southwest wind around 6 mph.

    High: 55 °F

    Chance Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 50. South wind around 6 mph.

    Low: 50 °F

    Chance Rain

  • Saturday

    Saturday: A 10 percent chance of rain after 4pm. Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Rain, mainly after 10pm. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Rain

  • Sunday

    Sunday: Rain. Mostly cloudy, with a high near 55.

    High: 55 °F

    Rain

Detailed Forecast

Tonight
Rain. Low around 49. South southwest wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain, mainly before 11am. High near 53. East wind around 5 mph becoming calm in the morning. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 49. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 40 percent chance of rain. Cloudy, with a high near 55. South southwest wind around 6 mph.
Friday Night
A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 50. South wind around 6 mph.
Saturday
A 10 percent chance of rain after 4pm. Partly sunny, with a high near 56.
Saturday Night
Rain, mainly after 10pm. Low around 51. Chance of precipitation is 80%.
Sunday
Rain. Mostly cloudy, with a high near 55.
Sunday Night
Rain. Mostly cloudy, with a low around 52.
Monday
Rain. Cloudy, with a high near 57.
Monday Night
Rain. Cloudy, with a low around 48.
Tuesday
Rain. Cloudy, with a high near 51.
Tuesday Night
Rain. Cloudy, with a low around 45.
Wednesday
Rain. Cloudy, with a high near 49.
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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:
9:57 pm PST Dec 10, 2025
Forecast Valid:
11pm PST Dec 10, 2025-6pm PST Dec 17, 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