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

Renton Municipal Airport (KRNT)

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

Clear

63°F

17°C

Humidity 77%
Wind Speed NW 6 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 02 Oct 10:00 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 53 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 68. North northeast wind around 6 mph.

    High: 68 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51. Northeast wind 3 to 5 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. Calm wind becoming north northeast around 5 mph after midnight.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 68. North northeast wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 51. Northeast wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 70. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 53. Calm wind.
Monday
Partly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 50.
Friday
A chance of rain. Partly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
11:26 am PDT Oct 2, 2026
Forecast Valid:
10pm PDT Oct 2, 2026-6pm PDT Oct 9, 2026
 
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Additional Resources

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Chance of Precipitation