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

Critical Fire Weather in the Plains; Unseasonably Warm in the Southwest and Southern U.S.

Unseasonably warm temperatures continue through the weekend across the Southwest and southern U.S., with more than 100 record or near record maximum temperatures forecast through the rest of the week and over the weekend. Elevated to critical fire weather conditions will persist across the Plains and Southeast U.S. this weekend. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Overcast

43°F

6°C

Humidity 75%
Wind Speed SSE 3 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 29 Mar 07:00 AM PDT
Extended Forecast for

Mercer Island WA

  • Today

    Today: Rain. High near 49. Calm wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Rain

  • Tonight

    Tonight: Rain likely, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. North northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain Likely
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 51. Light and variable wind.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 36. North wind around 6 mph becoming calm in the evening.

    Low: 36 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 55. Light and variable wind.

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Rain. High near 51. Chance of precipitation is 90%.

    High: 51 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly before 11pm. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Rain

  • Thursday

    Thursday: A chance of rain. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance Rain

Detailed Forecast

Today
Rain. High near 49. Calm wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain likely, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. North northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Sunny, with a high near 51. Light and variable wind.
Monday Night
Increasing clouds, with a low around 36. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 55. Light and variable wind.
Tuesday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 43.
Wednesday
Rain. High near 51. Chance of precipitation is 90%.
Wednesday Night
Rain, mainly before 11pm. Mostly cloudy, with a low around 42.
Thursday
A chance of rain. Mostly cloudy, with a high near 53.
Thursday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 43.
Friday
A slight chance of rain. Partly sunny, with a high near 56.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.25°W (Elev. 105 ft)
Last Update:
11:27 pm PDT Mar 28, 2026
Forecast Valid:
7am PDT Mar 29, 2026-6pm PDT Apr 4, 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