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

57°F

14°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 03 Oct 12:15 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A 10 percent chance of showers after 5pm. Mostly sunny, with a high near 68. West wind 3 to 5 mph.

    High: 68 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 50 percent chance of showers. Mostly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 11am. Mostly cloudy, with a high near 64. Light north wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 11pm. Mostly cloudy, with a low around 48. North northeast wind 3 to 5 mph.

    Low: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 65. North northeast wind 5 to 8 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

This Afternoon
A 10 percent chance of showers after 5pm. Mostly sunny, with a high near 68. West wind 3 to 5 mph.
Tonight
A 50 percent chance of showers. Mostly cloudy, with a low around 54. Calm wind.
Saturday
Showers likely, mainly after 11am. Mostly cloudy, with a high near 64. Light north wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 30 percent chance of showers before 11pm. Mostly cloudy, with a low around 48. North northeast wind 3 to 5 mph.
Sunday
Sunny, with a high near 65. North northeast wind 5 to 8 mph.
Sunday Night
Clear, with a low around 45.
Monday
Sunny, with a high near 69.
Monday Night
Clear, with a low around 48.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
A chance of rain. Mostly sunny, with a high near 67.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 49.
Thursday
A chance of rain. Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
8:00 am PDT Oct 3, 2025
Forecast Valid:
12pm PDT Oct 3, 2025-6pm PDT Oct 9, 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