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

36°F

2°C

Humidity 100%
Wind Speed S 6 MPH
Barometer 29.62 in (1003.05 mb)
Dewpoint 36°F (2°C)
Visibility 9.00 mi
Wind Chill31°F (-1°C)
Last update 26 Dec 06:55 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Rain before 1pm, then a chance of rain and snow. High near 42. South southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 42 °F

    Rain then
    Rain/Snow
    Likely

  • Tonight

    Tonight: Rain likely before 1am, then a chance of snow. Mostly cloudy, with a low around 33. West southwest wind 7 to 11 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 33 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 39. Southwest wind around 6 mph becoming northwest in the afternoon.

    High: 39 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32. Light east southeast wind.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Light southeast wind.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

Detailed Forecast

Today
Rain before 1pm, then a chance of rain and snow. High near 42. South southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tonight
Rain likely before 1am, then a chance of snow. Mostly cloudy, with a low around 33. West southwest wind 7 to 11 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
Mostly sunny, with a high near 39. Southwest wind around 6 mph becoming northwest in the afternoon.
Saturday Night
Mostly cloudy, with a low around 32. Light east southeast wind.
Sunday
Partly sunny, with a high near 41. Light southeast wind.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Mostly cloudy, with a high near 43.
Monday Night
Mostly cloudy, with a low around 33.
Tuesday
Mostly cloudy, with a high near 45.
Tuesday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 37.
Wednesday
A chance of rain. Cloudy, with a high near 46.
Wednesday Night
A chance of rain. Cloudy, with a low around 40.
New Year's Day
Rain likely. Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
7:01 am PST Dec 26, 2025
Forecast Valid:
7am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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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