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

Tracking Winter Storm and Severe Weather Impacts Through This Weekend

Heavy mountain snow will continue into Thursday afternoon across the Cascades. Two fast moving storms will track from the southern Rockies to the Great Lakes Thursday and then Friday into Sunday with areas of gusty winds, and heavy snow. In the Southeast U.S., severe thunderstorms and heavy to excessive rainfall are forecast on Friday. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Mostly Cloudy

41°F

5°C

Humidity 85%
Wind Speed SE 6 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 07 Jan 11:53 PM PST
Extended Forecast for

Mercer Island WA

  • Overnight

    Overnight: Rain showers likely before 4am, then a chance of rain and snow showers. Mostly cloudy, with a low around 36. South wind around 6 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain/Snow
    Likely

  • Thursday

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

    High: 45 °F

    Rain/Snow
    Likely then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 41. South wind around 6 mph.

    Low: 41 °F

    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain before 10am. Mostly cloudy, with a high near 49. South wind around 7 mph.

    High: 49 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. Light east southeast wind.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

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

    High: 49 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

  • Sunday

    Sunday: A chance of rain. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

Detailed Forecast

Overnight
Rain showers likely before 4am, then a chance of rain and snow showers. Mostly cloudy, with a low around 36. South wind around 6 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
Rain and snow showers likely, becoming all rain after 10am. Mostly cloudy, with a high near 45. South wind around 8 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 41. South wind around 6 mph.
Friday
A 30 percent chance of rain before 10am. Mostly cloudy, with a high near 49. South wind around 7 mph.
Friday Night
Mostly cloudy, with a low around 38. Light east southeast wind.
Saturday
A 20 percent chance of rain after 10am. Mostly cloudy, with a high near 49.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42.
Sunday
A chance of rain. Mostly cloudy, with a high near 50.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 45.
Monday
A chance of rain. Mostly cloudy, with a high near 54.
Monday Night
A chance of rain. Mostly cloudy, with a low around 47.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 56.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A slight chance of rain. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
7:01 pm PST Jan 7, 2026
Forecast Valid:
12am PST Jan 8, 2026-6pm PST Jan 14, 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