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

Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Saturday

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into the Tennessee Valley Saturday. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys Saturday. Extreme heat will continue for the Intermountain West and Plains. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Mostly Cloudy

66°F

19°C

Humidity 68%
Wind Speed NNW 13 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 10 Jul 09:05 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. Light and variable wind becoming south 5 to 8 mph after midnight.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 72. Southwest wind 5 to 8 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 53. West southwest wind 5 to 7 mph becoming southeast after midnight.

    Low: 53 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 71. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 71 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Northeast wind 5 to 9 mph.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 55. Light and variable wind becoming south 5 to 8 mph after midnight.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 72. Southwest wind 5 to 8 mph.
Saturday Night
Increasing clouds, with a low around 53. West southwest wind 5 to 7 mph becoming southeast after midnight.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 71. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 50. Northeast wind 5 to 9 mph.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 55.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
A slight chance of rain. Mostly sunny, with a high near 81.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 57.
Friday
Sunny, with a high near 78.
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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:
2:13 pm PDT Jul 10, 2026
Forecast Valid:
9pm PDT Jul 10, 2026-6pm PDT Jul 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation