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.

Mist

54°F

12°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 54°F (12°C)
Visibility 4.00 mi
Last update 15 Nov 08:00 PM PST
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: Rain, mainly after 8am. High near 56. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain. Low around 47. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Monday

    Monday: Rain likely, mainly before 10am. Mostly cloudy, with a high near 52. South southwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Rain Likely

  • Monday Night

    Monday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 42. Calm wind becoming south around 5 mph in the evening.

    Low: 42 °F

    Chance Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain after 4pm. Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 10pm. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Rain Likely

Detailed Forecast

Tonight
A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 51. Calm wind.
Sunday
Rain, mainly after 8am. High near 56. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain. Low around 47. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 52. South southwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 42. Calm wind becoming south around 5 mph in the evening.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
A chance of rain after 4pm. Partly sunny, with a high near 51.
Wednesday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 44.
Thursday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 53.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 40.
Friday
A chance of rain. Partly sunny, with a high near 52.
Friday Night
Rain likely. Mostly cloudy, with a low around 42.
Saturday
Rain likely. Mostly cloudy, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
7:01 pm PST Nov 15, 2025
Forecast Valid:
8pm PST Nov 15, 2025-6pm PST Nov 22, 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