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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 81%
Wind Speed E 3 MPH
Barometer 30.47 in (1031.83 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 14 Jan 06:00 AM PST
Extended Forecast for

Mercer Island WA

  • Today

    Today: Areas of fog before noon. Otherwise, mostly cloudy, with a high near 53. Light and variable wind.

    High: 53 °F

    Areas Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 44. Light north wind.

    Low: 44 °F

    Patchy Dense
    Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 51. North northeast wind around 6 mph.

    High: 51 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 39. North northeast wind 3 to 6 mph.

    Low: 39 °F

    Patchy Fog

  • Friday

    Friday: Sunny, with a high near 53. North northeast wind 3 to 5 mph.

    High: 53 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

Detailed Forecast

Today
Areas of fog before noon. Otherwise, mostly cloudy, with a high near 53. Light and variable wind.
Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 44. Light north wind.
Thursday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 51. North northeast wind around 6 mph.
Thursday Night
Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 39. North northeast wind 3 to 6 mph.
Friday
Sunny, with a high near 53. North northeast wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 37.
M.L.King Day
Mostly sunny, with a high near 51.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.6°N 122.22°W (Elev. 3 ft)
Last Update:
6:01 am PST Jan 14, 2026
Forecast Valid:
6am PST Jan 14, 2026-6pm PST Jan 20, 2026
 
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