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

47°F

8°C

Humidity 83%
Wind Speed N 0 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 18 Nov 11:53 AM PST
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 49. Calm wind.

    High: 49 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 53. East northeast wind around 5 mph becoming calm in the morning.

    High: 53 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 42. Southeast wind 7 to 9 mph, with gusts as high as 28 mph.

    Low: 42 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain, mainly before 10am. Partly sunny, with a high near 54. South southeast wind around 6 mph becoming southwest in the afternoon.

    High: 54 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance Rain

  • Friday Night

    Friday Night: Rain likely, mainly after 10pm. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Rain Likely

  • Saturday

    Saturday: Rain likely. Cloudy, with a high near 54.

    High: 54 °F

    Rain Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 49. Calm wind.
Tonight
Partly cloudy, with a low around 37. Calm wind.
Wednesday
Mostly sunny, with a high near 53. East northeast wind around 5 mph becoming calm in the morning.
Wednesday Night
A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 42. Southeast wind 7 to 9 mph, with gusts as high as 28 mph.
Thursday
A 40 percent chance of rain, mainly before 10am. Partly sunny, with a high near 54. South southeast wind around 6 mph becoming southwest in the afternoon.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 44.
Friday
A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 53.
Friday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 48.
Saturday
Rain likely. Cloudy, with a high near 54.
Saturday Night
Rain likely. Mostly cloudy, with a low around 46.
Sunday
Rain likely. Mostly cloudy, with a high near 53.
Sunday Night
Rain. Mostly cloudy, with a low around 43.
Monday
Rain. Mostly cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
12:06 pm PST Nov 18, 2025
Forecast Valid:
12pm PST Nov 18, 2025-6pm PST Nov 24, 2025
 
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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