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

64°F

18°C

Humidity 48%
Wind Speed W 4 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 16 Jun 12:10 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Mostly clear, with a low around 49. South wind 3 to 5 mph.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72. Southwest wind around 6 mph.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 11pm. Increasing clouds, with a low around 56. South wind around 7 mph.

    Low: 56 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before 11am. Partly sunny, with a high near 68. West southwest wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49. West wind 5 to 8 mph becoming light and variable after midnight.

    Low: 49 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after 11am. Mostly cloudy, with a high near 61.

    High: 61 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely, mainly before 11pm. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 49. South wind 3 to 5 mph.
Tuesday
Sunny, with a high near 72. Southwest wind around 6 mph.
Tuesday Night
A 30 percent chance of showers after 11pm. Increasing clouds, with a low around 56. South wind around 7 mph.
Wednesday
Showers likely, mainly before 11am. Partly sunny, with a high near 68. West southwest wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Partly cloudy, with a low around 49. West wind 5 to 8 mph becoming light and variable after midnight.
Juneteenth
Mostly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Showers likely, mainly after 11am. Mostly cloudy, with a high near 61.
Friday Night
Showers likely, mainly before 11pm. Mostly cloudy, with a low around 50.
Saturday
Showers. Mostly cloudy, with a high near 58.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 52.
Sunday
A chance of showers. Mostly cloudy, with a high near 66.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 52.
Monday
Partly sunny, with a high near 73.
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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:
9:40 pm PDT Jun 16, 2025
Forecast Valid:
11pm PDT Jun 16, 2025-6pm PDT Jun 23, 2025
 
Forecast Discussion
 
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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