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

54°F

12°C

Humidity 77%
Wind Speed S 9 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 22 Nov 07:53 PM PST
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Showers, mainly after 11pm. Low around 47. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers, mainly before noon. High near 49. South wind 5 to 9 mph becoming north northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 49 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely. Mostly cloudy, with a low around 38. South wind 3 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 10am. Mostly cloudy, with a high near 46. South southwest wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 37. Light southeast wind.

    Low: 37 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly after 10am. Mostly cloudy, with a high near 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers. Low around 41. Chance of precipitation is 80%.

    Low: 41 °F

    Showers

  • Wednesday

    Wednesday: Showers likely. Cloudy, with a high near 49.

    High: 49 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely. Cloudy, with a low around 45.

    Low: 45 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers, mainly after 11pm. Low around 47. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, mainly before noon. High near 49. South wind 5 to 9 mph becoming north northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely. Mostly cloudy, with a low around 38. South wind 3 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, mainly before 10am. Mostly cloudy, with a high near 46. South southwest wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 37. Light southeast wind.
Tuesday
Showers likely, mainly after 10am. Mostly cloudy, with a high near 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers. Low around 41. Chance of precipitation is 80%.
Wednesday
Showers likely. Cloudy, with a high near 49.
Wednesday Night
Showers likely. Cloudy, with a low around 45.
Thanksgiving Day
Showers likely. Mostly cloudy, with a high near 52.
Thursday Night
Showers likely. Mostly cloudy, with a low around 45.
Friday
Showers likely. Mostly cloudy, with a high near 49.
Friday Night
Showers likely. Mostly cloudy, with a low around 40.
Saturday
A chance of showers. Mostly cloudy, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
7:01 pm PST Nov 22, 2025
Forecast Valid:
8pm PST Nov 22, 2025-6pm PST Nov 29, 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