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

Heavy Mountain Snow in the Northwest U.S.; Wintry Mix in the Northeast U.S.

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. overnight into Wednesday. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Overcast

45°F

7°C

Humidity 75%
Wind Speed SSW 5 MPH
Barometer 29.72 in (1006.44 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 06 Jan 11:00 PM PST
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: A 50 percent chance of rain. Mostly cloudy, with a low around 42. South southwest wind around 10 mph.

    Low: 42 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain, mainly before 2pm. High near 45. South wind around 11 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: 45 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 4am, then rain and snow likely. Mostly cloudy, with a low around 38. South southwest wind 7 to 9 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Rain and snow likely, becoming all rain after 10am. Mostly cloudy, with a high near 45. South southwest wind around 8 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 45 °F

    Rain/Snow
    Likely then
    Rain Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 42. South wind around 6 mph.

    Low: 42 °F

    Chance Rain

  • Friday

    Friday: A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 49.

    High: 49 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday Night

    Friday Night: A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Saturday

    Saturday: A chance of rain, mainly after 10am. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Rain Likely

Detailed Forecast

Tonight
A 50 percent chance of rain. Mostly cloudy, with a low around 42. South southwest wind around 10 mph.
Wednesday
Rain, mainly before 2pm. High near 45. South wind around 11 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.
Wednesday Night
Rain likely before 4am, then rain and snow likely. Mostly cloudy, with a low around 38. South southwest wind 7 to 9 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
Rain and snow likely, becoming all rain after 10am. Mostly cloudy, with a high near 45. South southwest wind around 8 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
A 50 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 42. South wind around 6 mph.
Friday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 49.
Friday Night
A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 40.
Saturday
A chance of rain, mainly after 10am. Mostly cloudy, with a high near 50.
Saturday Night
Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 43.
Sunday
A chance of rain, mainly before 10am. Mostly cloudy, with a high near 51.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 45.
Monday
A chance of rain. Mostly cloudy, with a high near 52.
Monday Night
A chance of rain. Mostly cloudy, with a low around 45.
Tuesday
A slight 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 122.25°W (Elev. 105 ft)
Last Update:
7:00 pm PST Jan 6, 2026
Forecast Valid:
11pm PST Jan 6, 2026-6pm PST Jan 13, 2026
 
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