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

64°F

18°C

Humidity 80%
Wind Speed N 0 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 12 Sep 11:53 PM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Partly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 11pm. Increasing clouds, with a low around 58. Light and variable wind becoming south 5 to 7 mph in the evening.

    Low: 58 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: Rain likely. Cloudy, with a high near 66. South southwest wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 54. South wind around 6 mph.

    Low: 54 °F

    Chance Rain

  • Monday

    Monday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 54. Calm wind.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 74. Light and variable wind.
Saturday Night
A 20 percent chance of rain after 11pm. Increasing clouds, with a low around 58. Light and variable wind becoming south 5 to 7 mph in the evening.
Sunday
Rain likely. Cloudy, with a high near 66. South southwest wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 54. South wind around 6 mph.
Monday
Partly sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
A slight chance of rain after 11am. Mostly sunny, with a high near 72.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 52.
Thursday
A slight chance of rain. Partly sunny, with a high near 68.
Thursday Night
A chance of rain. Partly cloudy, with a low around 51.
Friday
A chance of rain. Mostly sunny, with a high near 69.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
8:01 pm PDT Sep 12, 2025
Forecast Valid:
12am PDT Sep 13, 2025-6pm PDT Sep 19, 2025
 
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