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 67%
Wind Speed NNW 6 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 14 Oct 12:53 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Sunny, with a high near 63. Calm wind.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 47. Northeast wind 3 to 5 mph.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70. Light east wind.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. East wind 3 to 7 mph.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 72. East southeast wind around 5 mph becoming calm in the morning.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of rain after 11pm. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance Rain

  • Saturday

    Saturday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 59. Chance of precipitation is 70%.

    High: 59 °F

    Rain Likely
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 63. Calm wind.
Tonight
Mostly clear, with a low around 47. Northeast wind 3 to 5 mph.
Thursday
Sunny, with a high near 70. Light east wind.
Thursday Night
Mostly clear, with a low around 51. East wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 72. East southeast wind around 5 mph becoming calm in the morning.
Friday Night
A 50 percent chance of rain after 11pm. Mostly cloudy, with a low around 54.
Saturday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 59. Chance of precipitation is 70%.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 56.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
A chance of rain. Mostly cloudy, with a high near 54.
Monday Night
A chance of rain. Mostly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
12:50 pm PDT Oct 14, 2026
Forecast Valid:
1pm PDT Oct 14, 2026-6pm PDT Oct 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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