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

Boeing Field - King County International Airport (KBFI)

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

Mostly Cloudy

45°F

7°C

Humidity 85%
Wind Speed N 0 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 04 Nov 02:53 AM PST
Extended Forecast for

Mercer Island WASimilar City Names

  • Overnight

    Overnight: Mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 58. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 58 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain, mainly after 9pm. Steady temperature around 54. East southeast wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Rain

  • Wednesday

    Wednesday: Rain. High near 61. South wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Low around 51. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 51 °F

    Rain

  • Thursday

    Thursday: Rain. High near 58. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 48. Chance of precipitation is 100%.

    Low: 48 °F

    Rain

  • Friday

    Friday: Rain, mainly before 4pm. Cloudy, with a high near 55.

    High: 55 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 45. Calm wind.
Tuesday
Mostly cloudy, with a high near 58. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Rain, mainly after 9pm. Steady temperature around 54. East southeast wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain. High near 61. South wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 51. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain. High near 58. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain. Low around 48. Chance of precipitation is 100%.
Friday
Rain, mainly before 4pm. Cloudy, with a high near 55.
Friday Night
A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 43.
Saturday
A slight chance of rain. Partly sunny, with a high near 56.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 47.
Sunday
A chance of rain. Mostly cloudy, with a high near 60.
Sunday Night
Rain. Mostly cloudy, with a low around 49.
Monday
Rain. Mostly cloudy, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WASimilar City Names
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
1:25 am PST Nov 4, 2025
Forecast Valid:
3am PST Nov 4, 2025-6pm PST Nov 10, 2025
 
Forecast Discussion
 
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Additional Resources

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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