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.

Clear

39°F

4°C

Humidity 93%
Wind Speed NNW 13 MPH
Barometer 29.59 in (1002.03 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 25 Dec 04:35 AM PST
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: A 30 percent chance of showers. Mostly cloudy, with a low around 37. Northeast wind around 8 mph.

    Low: 37 °F

    Chance
    Showers

  • Christmas Day

    Christmas Day: A 50 percent chance of showers. Mostly cloudy, with a high near 44. North northeast wind around 8 mph.

    High: 44 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 41. South wind around 8 mph.

    Low: 41 °F

    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 43. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 43 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 33. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers. Partly sunny, with a high near 39.

    High: 39 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Mostly cloudy, with a high near 41.

    High: 41 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers. Mostly cloudy, with a low around 37. Northeast wind around 8 mph.
Christmas Day
A 50 percent chance of showers. Mostly cloudy, with a high near 44. North northeast wind around 8 mph.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 41. South wind around 8 mph.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 43. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 33. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 39.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 32.
Sunday
A chance of showers. Mostly cloudy, with a high near 41.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 33.
Monday
A chance of showers. Mostly cloudy, with a high near 45.
Monday Night
A chance of showers. Mostly cloudy, with a low around 35.
Tuesday
A chance of showers. Mostly cloudy, with a high near 46.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 38.
Wednesday
A chance of showers. Mostly cloudy, with a high near 47.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
1:25 am PST Dec 25, 2025
Forecast Valid:
4am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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