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.

Overcast

66°F

19°C

Humidity 59%
Wind Speed S 16 MPH
Barometer 29.82 in (1009.82 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 01 Oct 03:30 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a steady temperature around 63. South wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly before 11pm. Mostly cloudy, with a low around 52. South southeast wind 8 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °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 6 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. Southeast wind 3 to 5 mph.

    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 30 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 51.

    Low: 51 °F

    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 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a steady temperature around 63. South wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely, mainly before 11pm. Mostly cloudy, with a low around 52. South southeast wind 8 to 11 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 6 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. Southeast wind 3 to 5 mph.
Friday
Partly sunny, with a high near 65. South southeast wind around 5 mph becoming light and variable.
Friday Night
A 30 percent chance of showers, mainly after 11pm. 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 64.
Sunday Night
Clear, with a low around 46.
Monday
Sunny, with a high near 68.
Monday Night
Clear, with a low around 47.
Tuesday
Sunny, with a high near 70.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 67.
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:
2:25 pm PDT Oct 1, 2025
Forecast Valid:
3pm PDT Oct 1, 2025-6pm PDT Oct 8, 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