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

55°F

13°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 04 Oct 07:00 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: A 50 percent chance of showers, mainly between 11am and 5pm. Partly sunny, with a high near 62. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 62 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers between 9pm and 11pm. Partly cloudy, with a low around 47. North northeast wind 3 to 6 mph.

    Low: 47 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 64. North wind around 7 mph.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 45. North wind 5 to 7 mph becoming east northeast after midnight.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 68. East northeast wind around 6 mph becoming north in the afternoon.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of rain, mainly after 11am. Mostly sunny, with a high near 66.

    High: 66 °F

    Chance Rain

Detailed Forecast

Today
A 50 percent chance of showers, mainly between 11am and 5pm. Partly sunny, with a high near 62. Calm wind becoming north northwest around 5 mph in the afternoon.
Tonight
A 20 percent chance of showers between 9pm and 11pm. Partly cloudy, with a low around 47. North northeast wind 3 to 6 mph.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 64. North wind around 7 mph.
Sunday Night
Clear, with a low around 45. North wind 5 to 7 mph becoming east northeast after midnight.
Monday
Sunny, with a high near 68. East northeast wind around 6 mph becoming north in the afternoon.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
A chance of rain, mainly after 11am. Mostly sunny, with a high near 66.
Wednesday Night
A chance of rain, mainly before 11pm. Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Partly cloudy, with a low around 49.
Friday
A slight chance of rain. Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
3:28 am PDT Oct 4, 2025
Forecast Valid:
7am PDT Oct 4, 2025-6pm PDT Oct 10, 2025
 
Forecast Discussion
 
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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