Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Northern Plains and Upper Midwest

Dangerous heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms will produce damaging winds and heavy rainfall over portions of the northern/central Plains into the mid/upper-Mississippi Valleys today. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

64°F

18°C

Humidity 63%
Wind Speed N 0 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 30 Jul 09:35 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Sunny, with a high near 76. Southwest wind 3 to 5 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. Calm wind becoming northwest around 5 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Light and variable wind becoming south 5 to 8 mph after midnight.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of rain after 11am.  Partly sunny, with a high near 73. South southwest wind 10 to 14 mph.

    High: 73 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 11pm.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 76. Southwest wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 56. Northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 82. Calm wind becoming northwest around 5 mph.
Friday Night
Mostly clear, with a low around 60. Light and variable wind becoming south 5 to 8 mph after midnight.
Saturday
A 30 percent chance of rain after 11am. Partly sunny, with a high near 73. South southwest wind 10 to 14 mph.
Saturday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 71.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
9:31 am PDT Jul 30, 2026
10am PDT Jul 30, 2026-6pm PDT Aug 5, 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