Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

75°F

24°C

Humidity 50%
Wind Speed NNW 11 MPH
Barometer 30.21 in (1023.03 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 09 Sep 02:05 PM PDT
Extended Forecast for

2 Miles ESE Mercer Island WA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 77. North northwest wind 3 to 5 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 71. Calm wind.

    High: 71 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of rain between 11pm and midnight.  Mostly cloudy, with a low around 56. Calm wind becoming south around 6 mph after midnight.  Chance of precipitation is 20%.

    Low: 56 °F

    Slight Chance
    Rain then
    Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 69. South southwest wind 3 to 6 mph.

    High: 69 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain, mainly after 11am.  Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain.  Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance Rain

  • Sunday

    Sunday: A slight chance of rain before 11am.  Mostly cloudy, with a high near 70.

    High: 70 °F

    Slight Chance
    Rain then
    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 77. North northwest wind 3 to 5 mph.
Tonight
Mostly cloudy, with a low around 58. Calm wind.
Thursday
Mostly cloudy, with a high near 71. Calm wind.
Thursday Night
A slight chance of rain between 11pm and midnight. Mostly cloudy, with a low around 56. Calm wind becoming south around 6 mph after midnight. Chance of precipitation is 20%.
Friday
Mostly cloudy, with a high near 69. South southwest wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 55.
Saturday
A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 69.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 54.
Sunday
A slight chance of rain before 11am. Mostly cloudy, with a high near 70.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Mercer Island WA
 47.56°N 122.18°W (Elev. 207 ft)
11:26 am PDT Sep 9, 2026
2pm PDT Sep 9, 2026-6pm PDT Sep 15, 2026
 
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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