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.

Overcast

54°F

12°C

Humidity 66%
Wind Speed S 6 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 14 Jun 05:20 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 69. South wind around 5 mph becoming light and variable.

    High: 69 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 49. North northwest wind around 5 mph becoming calm after midnight.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 72. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50. North northwest wind around 6 mph becoming calm after midnight.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 71. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 71 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers. Mostly sunny, with a high near 72.

    High: 72 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before 11am. Partly sunny, with a high near 70.

    High: 70 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 69. South wind around 5 mph becoming light and variable.
Tonight
Partly cloudy, with a low around 49. North northwest wind around 5 mph becoming calm after midnight.
Sunday
Sunny, with a high near 72. Calm wind becoming north northwest around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 50. North northwest wind around 6 mph becoming calm after midnight.
Monday
Partly sunny, with a high near 71. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 72.
Tuesday Night
A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 57.
Wednesday
Showers likely, mainly before 11am. Partly sunny, with a high near 70.
Wednesday Night
A slight chance of showers before 11pm. Partly cloudy, with a low around 51.
Juneteenth
A slight chance of showers. Partly sunny, with a high near 71.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 52.
Friday
A chance of showers. Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
3:40 am PDT Jun 14, 2025
Forecast Valid:
5am PDT Jun 14, 2025-6pm PDT Jun 20, 2025
 
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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