National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Clear

52°F

11°C

Humidity 81%
Wind Speed S 10 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 06 Dec 05:35 PM PST
Extended Forecast for

Mercer Island WA

Flood Watch December 8, 04:00am until December 12, 04:00pm
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: A 50 percent chance of rain. Partly sunny, with a high near 53. South southwest wind around 9 mph.

    High: 53 °F

    Chance Rain

  • Tonight

    Tonight: Rain, mainly after 2am. Low around 47. South wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Chance Rain
    then Rain

  • Sunday

    Sunday: Rain, mainly before noon. High near 54. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 54 °F

    Rain then
    Chance Rain

  • Sunday Night

    Sunday Night: Rain. Low around 49. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain

  • Monday

    Monday: Rain. High near 56. South wind 9 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 56 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 47. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Rain

  • Tuesday

    Tuesday: Rain. High near 51. Chance of precipitation is 80%.

    High: 51 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Cloudy, with a low around 46.

    Low: 46 °F

    Rain

  • Wednesday

    Wednesday: Rain. Cloudy, with a high near 53.

    High: 53 °F

    Rain

Detailed Forecast

This Afternoon
A 50 percent chance of rain. Partly sunny, with a high near 53. South southwest wind around 9 mph.
Tonight
Rain, mainly after 2am. Low around 47. South wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain, mainly before noon. High near 54. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain. Low around 49. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain. High near 56. South wind 9 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain. Low around 47. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain. High near 51. Chance of precipitation is 80%.
Tuesday Night
Rain. Cloudy, with a low around 46.
Wednesday
Rain. Cloudy, with a high near 53.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 45.
Thursday
Rain likely. Cloudy, with a high near 52.
Thursday Night
Rain likely. Mostly cloudy, with a low around 47.
Friday
A chance of rain. Mostly cloudy, with a high near 55.
Friday Night
A chance of rain. Mostly cloudy, with a low around 48.
Saturday
A chance of rain. Mostly cloudy, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
1:25 pm PST Dec 6, 2025
Forecast Valid:
5pm PST Dec 6, 2025-6pm PST Dec 13, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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