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

Critical Fire Weather Conditions in the Plains; Heavy Snow in the Sierra and Northern Rockies

Gusty winds and warm, very dry conditions will lead to a Critical Risk of fire weather across much of the High Plains through Thursday. A Pacific storm system will bring strong winds and precipitation from the Pacific Northwest to the Northern Rockies, with heavy mountain snow in the Sierra-Nevada and northern Rockies. Heavy snow will continue in the northern Rockies on Thursday. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

52°F

11°C

Humidity 89%
Wind Speed S 8 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 49°F (9°C)
Visibility 7.00 mi
Last update 22 Apr 12:53 PM PDT
Extended Forecast for

Mercer Island WA

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly before 3pm. Mostly cloudy, with a high near 57. South southwest wind 9 to 11 mph.

    High: 57 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. South wind 9 to 11 mph.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 62. South wind around 6 mph becoming west northwest in the afternoon.

    High: 62 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Northwest wind around 5 mph becoming light and variable in the evening.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64. Light north northeast wind becoming north 6 to 11 mph in the afternoon.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly before 3pm. Mostly cloudy, with a high near 57. South southwest wind 9 to 11 mph.
Tonight
Mostly cloudy, with a low around 47. South wind 9 to 11 mph.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 62. South wind around 6 mph becoming west northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 44. Northwest wind around 5 mph becoming light and variable in the evening.
Friday
Sunny, with a high near 64. Light north northeast wind becoming north 6 to 11 mph in the afternoon.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 66.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 46.
Monday
Mostly sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Mostly sunny, with a high near 68.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.56°N 122.21°W (Elev. 121 ft)
Last Update:
11:26 am PDT Apr 22, 2026
Forecast Valid:
1pm PDT Apr 22, 2026-6pm PDT Apr 28, 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