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

Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Partly Cloudy

63°F

17°C

Humidity 77%
Wind Speed N 10 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Aug 09:35 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Patchy smoke after 1pm. Sunny, with a high near 78. North wind 6 to 9 mph.

    High: 78 °F

    Sunny then
    Patchy Smoke

  • Tonight

    Tonight: Mostly clear, with a low around 56. North wind 5 to 7 mph becoming calm after midnight.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Southwest wind 6 to 8 mph.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. Southwest wind around 6 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

Detailed Forecast

Today
Patchy smoke after 1pm. Sunny, with a high near 78. North wind 6 to 9 mph.
Tonight
Mostly clear, with a low around 56. North wind 5 to 7 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 85. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 57. Southwest wind 6 to 8 mph.
Wednesday
Mostly sunny, with a high near 76. Southwest wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Partly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 71.
Friday Night
A chance of rain. Mostly cloudy, with a low around 54.
Saturday
A chance of rain. Mostly cloudy, with a high near 69.
Saturday Night
A slight chance of rain. Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
11:26 pm PDT Aug 23, 2026
Forecast Valid:
9am PDT Aug 24, 2026-6pm PDT Aug 30, 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