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

64°F

18°C

Humidity 63%
Wind Speed N 4 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 03 Oct 03:00 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Rain likely, mainly between 11pm and 2am. Increasing clouds, with a low around 53. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Rain Likely

  • Saturday

    Saturday: A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 63. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 63 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before 11pm. Partly cloudy, with a low around 48. North wind around 5 mph becoming calm.

    Low: 48 °F

    Chance Rain
    then Partly
    Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 65. North northeast wind 5 to 8 mph.

    High: 65 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. North wind 5 to 8 mph becoming light and variable after midnight.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Rain likely, mainly between 11pm and 2am. Increasing clouds, with a low around 53. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 63. Calm wind becoming north northwest around 5 mph in the afternoon.
Saturday Night
A 30 percent chance of rain before 11pm. Partly cloudy, with a low around 48. North wind around 5 mph becoming calm.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 65. North northeast wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 46. North wind 5 to 8 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 70.
Monday Night
Clear, with a low around 48.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
A chance of rain, mainly after 11am. Mostly sunny, with a high near 67.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 51.
Thursday
A chance of rain. Partly sunny, with a high near 66.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 50.
Friday
A chance of rain. Partly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
2:25 pm PDT Oct 3, 2025
Forecast Valid:
3pm PDT Oct 3, 2025-6pm PDT Oct 10, 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