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

45°F

7°C

Humidity 93%
Wind Speed SSE 4 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill43°F (6°C)
Last update 25 Nov 10:20 PM PST
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Rain before 2am, then a chance of rain after 4am. Steady temperature around 45. South wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Rain then
    Chance Rain

  • Wednesday

    Wednesday: A slight chance of rain before 10am, then a chance of rain after 2pm. Cloudy, with a high near 51. Light and variable wind. Chance of precipitation is 30%.

    High: 51 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly after 10pm. Low around 45. Calm wind becoming east northeast around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Rain

  • Thanksgiving Day

    Thanksgiving Day: Rain. High near 50. East southeast wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 50 °F

    Rain

  • Thursday Night

    Thursday Night: Rain, mainly before 10pm. Low around 42. North wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Rain then
    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain before 10am. Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain
    then Partly
    Sunny

  • Friday Night

    Friday Night: A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Saturday

    Saturday: A slight chance of rain before 10am. Mostly cloudy, with a high near 48.

    High: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain before 2am, then a chance of rain after 4am. Steady temperature around 45. South wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A slight chance of rain before 10am, then a chance of rain after 2pm. Cloudy, with a high near 51. Light and variable wind. Chance of precipitation is 30%.
Wednesday Night
Rain, mainly after 10pm. Low around 45. Calm wind becoming east northeast around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thanksgiving Day
Rain. High near 50. East southeast wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain, mainly before 10pm. Low around 42. North wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A 30 percent chance of rain before 10am. Partly sunny, with a high near 50.
Friday Night
A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 39.
Saturday
A slight chance of rain before 10am. Mostly cloudy, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 47.
Sunday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 38.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 48.
Monday Night
A chance of rain. Mostly cloudy, with a low around 42.
Tuesday
A chance of rain. Mostly cloudy, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
7:01 pm PST Nov 25, 2025
Forecast Valid:
10pm PST Nov 25, 2025-6pm PST Dec 2, 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