National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Winter Weather and Frigid Temperatures This Weekend

Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Mist

31°F

-1°C

Humidity 96%
Wind Speed N 0 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 30°F (-1°C)
Visibility 0.50 mi
Last update 18 Jan 07:41 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Sunny, with a high near 51. Calm wind.

    High: 51 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. Light east northeast wind.

    Low: 36 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 50. Light east wind.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 48. Calm wind.

    High: 48 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of rain after 10am. Mostly cloudy, with a high near 45.

    High: 45 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 51. Calm wind.
Tonight
Mostly clear, with a low around 36. Light east northeast wind.
M.L.King Day
Sunny, with a high near 50. Light east wind.
Monday Night
Mostly clear, with a low around 35. Calm wind.
Tuesday
Partly sunny, with a high near 48. Calm wind.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Mostly cloudy, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 37.
Thursday
A slight chance of rain after 10am. Mostly cloudy, with a high near 45.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 40.
Friday
A chance of rain. Mostly cloudy, with a high near 45.
Friday Night
Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 35.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 41.
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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 Jan 18, 2026
Forecast Valid:
7am PST Jan 18, 2026-6pm PST Jan 24, 2026
 
Forecast Discussion
 
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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