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.

Mist

54°F

12°C

Humidity 100%
Wind Speed SSE 6 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 54°F (12°C)
Visibility 6.00 mi
Last update 15 Nov 02:00 AM PST
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Rain likely, mainly after 4am. Cloudy, with a low around 51. South southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Rain Likely

  • Saturday

    Saturday: Rain likely, mainly after 2pm. Mostly cloudy, with a high near 57. South wind 3 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Rain Likely

  • Saturday Night

    Saturday Night: A slight chance of rain before 10pm, then a chance of rain after 3am. Mostly cloudy, with a low around 50. Calm wind. Chance of precipitation is 30%.

    Low: 50 °F

    Chance Rain

  • Sunday

    Sunday: Rain likely, mainly after 10am. Cloudy, with a high near 56. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain before midnight, then showers, mainly after midnight. Low around 48. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Rain

  • Monday

    Monday: Showers likely, mainly before 10am. Mostly cloudy, with a high near 53. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Partly sunny, with a high near 51.

    High: 51 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain likely, mainly after 4am. Cloudy, with a low around 51. South southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely, mainly after 2pm. Mostly cloudy, with a high near 57. South wind 3 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A slight chance of rain before 10pm, then a chance of rain after 3am. Mostly cloudy, with a low around 50. Calm wind. Chance of precipitation is 30%.
Sunday
Rain likely, mainly after 10am. Cloudy, with a high near 56. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain before midnight, then showers, mainly after midnight. Low around 48. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, mainly before 10am. Mostly cloudy, with a high near 53. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 43.
Tuesday
A chance of showers. Partly sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
A slight chance of rain after 10am. Partly sunny, with a high near 51.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 44.
Thursday
Rain likely. Mostly cloudy, with a high near 52.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 42.
Friday
A chance of rain. Partly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
1:25 am PST Nov 15, 2025
Forecast Valid:
2am PST Nov 15, 2025-6pm PST Nov 21, 2025
 
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Additional Resources

Radar & Satellite Image

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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