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.

Partly Cloudy

68°F

20°C

Humidity 45%
Wind Speed SW 5 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 02 Oct 01:30 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A chance of showers between 2pm and 5pm. Partly sunny, with a high near 67. South southwest wind around 6 mph. Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers between 7pm and 8pm. Mostly clear, with a low around 51. Calm wind. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 67. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 11pm. Increasing clouds, with a low around 53. Light and variable wind.

    Low: 53 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly after 11am. Mostly cloudy, with a high near 64. Light and variable wind.

    High: 64 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers between 2pm and 5pm. Partly sunny, with a high near 67. South southwest wind around 6 mph. Chance of precipitation is 30%.
Tonight
A slight chance of showers between 7pm and 8pm. Mostly clear, with a low around 51. Calm wind. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 67. Calm wind becoming west northwest around 5 mph in the afternoon.
Friday Night
A 20 percent chance of showers after 11pm. Increasing clouds, with a low around 53. Light and variable wind.
Saturday
A 30 percent chance of showers, mainly after 11am. Mostly cloudy, with a high near 64. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Sunny, with a high near 66.
Sunday Night
Clear, with a low around 47.
Monday
Sunny, with a high near 70.
Monday Night
Clear, with a low around 48.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.56°N 122.18°W (Elev. 207 ft)
Last Update:
8:01 am PDT Oct 2, 2025
Forecast Valid:
1pm PDT Oct 2, 2025-6pm PDT Oct 8, 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