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

Extreme Heat and Severe Thunderstorms Today

Extreme heat continues today from the central Plains to the lower Mississippi River Valley, over southeast Montana, and from southern California into the Southwest Deserts. Extreme Heat Warnings remain in effect. Severe thunderstorms capable of strong to severe wind gusts and large hail are possible across the Great Lakes into the Ohio Valley today into tonight. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

81°F

27°C

Humidity 39%
Wind Speed WSW 6 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 27 Jul 05:20 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Increasing clouds, with a low around 59. Light west wind becoming south 5 to 9 mph after midnight.

    Low: 59 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75. Southwest wind around 9 mph.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57. Southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 75 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. North wind 5 to 7 mph becoming calm after midnight.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Friday Night

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

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 59. Light west wind becoming south 5 to 9 mph after midnight.
Tuesday
Mostly sunny, with a high near 75. Southwest wind around 9 mph.
Tuesday Night
Mostly cloudy, with a low around 57. Southwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming west northwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 55. North wind 5 to 7 mph becoming calm after midnight.
Thursday
Sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 76.
Saturday Night
A slight chance of rain. Partly cloudy, with a low around 57.
Sunday
A slight chance of rain. Partly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
12:46 pm PDT Jul 27, 2026
Forecast Valid:
5pm PDT Jul 27, 2026-6pm PDT Aug 3, 2026
 
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Additional Resources

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