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

39°F

4°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.24 in (1024.04 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 08 Nov 04:00 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Mostly sunny, with a high near 58. Calm wind becoming east 5 to 7 mph in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. Southeast wind 6 to 13 mph.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 63. South southwest wind around 9 mph.

    High: 63 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 51. South southeast wind around 9 mph.

    Low: 51 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly before 4pm. Mostly cloudy, with a high near 57. South wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Rain Likely

  • Monday Night

    Monday Night: A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after 10am. Mostly cloudy, with a high near 57.

    High: 57 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 58. Calm wind becoming east 5 to 7 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 47. Southeast wind 6 to 13 mph.
Sunday
Partly sunny, with a high near 63. South southwest wind around 9 mph.
Sunday Night
A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 51. South southeast wind around 9 mph.
Monday
Rain likely, mainly before 4pm. Mostly cloudy, with a high near 57. South wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 45.
Veterans Day
Partly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
A slight chance of rain after 10am. Mostly cloudy, with a high near 57.
Wednesday Night
A chance of rain. Cloudy, with a low around 48.
Thursday
Rain. Mostly cloudy, with a high near 54.
Thursday Night
Rain. Mostly cloudy, with a low around 46.
Friday
Rain likely. Mostly cloudy, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
1:25 am PST Nov 8, 2025
Forecast Valid:
4am PST Nov 8, 2025-6pm PST Nov 14, 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