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Fire Weather Concerns; Record Warmth Spreads

The Plains to the mid-Mississippi Valley continue with warm and dry conditions. Any fires that initiate could spread quickly. The warm temperatures will expand across the Southern Plains into the Southwest where numerous records are expected through the weekend. Meanwhile, a cold front will move southward across the northern Plains and Great Lakes region where some snow will develop this weekend. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Partly Cloudy

50°F

10°C

Humidity 61%
Wind Speed NNW 9 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 28 Feb 12:00 PM PST
Extended Forecast for

Mercer Island WA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 53. North wind around 8 mph.

    High: 53 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. North northeast wind around 5 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 57. Calm wind becoming north around 5 mph in the afternoon.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 57. Light south southwest wind.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 10am. Cloudy, with a high near 55. Chance of precipitation is 70%.

    High: 55 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain. Cloudy, with a low around 45.

    Low: 45 °F

    Rain

  • Wednesday

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

    High: 53 °F

    Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 53. North wind around 8 mph.
Tonight
Mostly cloudy, with a low around 37. North northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 57. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 37. Calm wind.
Monday
Mostly sunny, with a high near 57. Light south southwest wind.
Monday Night
A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 42.
Tuesday
Rain likely, mainly after 10am. Cloudy, with a high near 55. Chance of precipitation is 70%.
Tuesday Night
Rain. Cloudy, with a low around 45.
Wednesday
Rain. Cloudy, with a high near 53.
Wednesday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43.
Thursday
Rain likely. Mostly cloudy, with a high near 52.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 43.
Friday
Rain likely. Cloudy, with a high near 53.
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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:
7:01 am PST Feb 28, 2026
Forecast Valid:
12pm PST Feb 28, 2026-6pm PST Mar 6, 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