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

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Overcast

52°F

11°C

Humidity 76%
Wind Speed SSW 3 MPH
Barometer 30.19 in (1022.35 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 22 Nov 12:00 AM PST
Extended Forecast for

Mercer Island WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 48. South southeast wind around 5 mph.

    Low: 48 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain before 10am, then a chance of rain after 11am. Mostly cloudy, with a high near 56. South wind around 6 mph. Chance of precipitation is 30%.

    High: 56 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain, mainly after 10pm. Low around 49. South wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain

  • Sunday

    Sunday: Rain. High near 51. South southwest wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 40. South wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 10am. Partly sunny, with a high near 49. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Rain Likely
    then Chance
    Rain

  • Monday Night

    Monday Night: A slight chance of rain before 10pm, then a slight chance of rain after 4am. Mostly cloudy, with a low around 39. Chance of precipitation is 20%.

    Low: 39 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain, mainly after 10am. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain likely. Cloudy, with a low around 42.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 48. South southeast wind around 5 mph.
Saturday
A slight chance of rain before 10am, then a chance of rain after 11am. Mostly cloudy, with a high near 56. South wind around 6 mph. Chance of precipitation is 30%.
Saturday Night
Rain, mainly after 10pm. Low around 49. South wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 51. South southwest wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain likely. Mostly cloudy, with a low around 40. South wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely, mainly before 10am. Partly sunny, with a high near 49. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A slight chance of rain before 10pm, then a slight chance of rain after 4am. Mostly cloudy, with a low around 39. Chance of precipitation is 20%.
Tuesday
A chance of rain, mainly after 10am. Mostly cloudy, with a high near 47.
Tuesday Night
Rain likely. Cloudy, with a low around 42.
Wednesday
Rain likely. Cloudy, with a high near 51.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 45.
Thanksgiving Day
A chance of rain. Mostly cloudy, with a high near 53.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 44.
Friday
Rain likely. Mostly cloudy, with a high near 52.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.56°N 122.21°W (Elev. 121 ft)
Last Update:
7:01 pm PST Nov 21, 2025
Forecast Valid:
12am PST Nov 22, 2025-6pm PST Nov 28, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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