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 50%
Wind Speed S 11 MPH
Barometer 29.83 in (1010.16 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 01 Oct 04:53 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A 50 percent chance of showers. Partly sunny, with a steady temperature around 62. South wind around 8 mph.

    High: 62 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 11pm. Partly cloudy, with a low around 51. South southeast wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers before 9am, then a chance of showers after 11am. Partly sunny, with a high near 67. South southwest wind 5 to 8 mph. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 50. Calm wind becoming south around 5 mph in the evening.

    Low: 50 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 65. South southeast wind around 5 mph becoming light and variable.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 11am. Partly sunny, with a high near 62.

    High: 62 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Saturday Night

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

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers. Partly sunny, with a steady temperature around 62. South wind around 8 mph.
Tonight
Showers likely, mainly before 11pm. Partly cloudy, with a low around 51. South southeast wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A chance of showers before 9am, then a chance of showers after 11am. Partly sunny, with a high near 67. South southwest wind 5 to 8 mph. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 50. Calm wind becoming south around 5 mph in the evening.
Friday
Partly sunny, with a high near 65. South southeast wind around 5 mph becoming light and variable.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Saturday
A 20 percent chance of showers before 11am. Partly sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Mostly sunny, with a high near 65.
Sunday Night
Clear, with a low around 45.
Monday
Sunny, with a high near 69.
Monday Night
Clear, with a low around 47.
Tuesday
Sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
2:25 pm PDT Oct 1, 2025
Forecast Valid:
5pm PDT Oct 1, 2025-6pm PDT Oct 8, 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