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

Above Average Temperatures for the West and Central Plains; Lake Effect Snow Continues

Well above average temperatures will prevail across the Plains and the West Coast this week, while a cold front will bring Arctic air to the South and East Coast Thursday and Friday. Lake effect snow is forecast downwind of the Great Lakes through Thursday along and behind the Arctic front, as well as mountain snow across the Southern Appalachians. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Overcast

50°F

10°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.47 in (1031.83 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 14 Jan 05:00 AM PST
Extended Forecast for

Mercer Island WA

  • Today

    Today: Patchy fog before noon. Otherwise, mostly cloudy, with a high near 53. Calm wind.

    High: 53 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 46. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 46 °F

    Patchy Dense
    Fog

  • Thursday

    Thursday: Patchy fog between 9am and 10am. Otherwise, partly sunny, with a steady temperature around 48. North northeast wind 5 to 8 mph.

    High: 48 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. North northeast wind around 6 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 52. North northeast wind around 6 mph.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

Detailed Forecast

Today
Patchy fog before noon. Otherwise, mostly cloudy, with a high near 53. Calm wind.
Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 46. Calm wind becoming north northeast around 5 mph after midnight.
Thursday
Patchy fog between 9am and 10am. Otherwise, partly sunny, with a steady temperature around 48. North northeast wind 5 to 8 mph.
Thursday Night
Partly cloudy, with a low around 41. North northeast wind around 6 mph.
Friday
Sunny, with a high near 52. North northeast wind around 6 mph.
Friday Night
Mostly clear, with a low around 40.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 39.
M.L.King Day
Mostly sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 48.
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:
1:26 am PST Jan 14, 2026
Forecast Valid:
5am PST Jan 14, 2026-6pm PST Jan 20, 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