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.

Mostly Cloudy

36°F

2°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.67 in (1004.74 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 24 Dec 11:20 PM PST
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Partly cloudy, with a low around 38. Northeast wind around 5 mph.

    Low: 38 °F

    Partly Cloudy

  • Christmas Day

    Christmas Day: Rain likely, mainly after noon. Mostly cloudy, with a high near 45. North northeast wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 45 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly after 4am. Mostly cloudy, with a steady temperature around 42. South southeast wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain Likely

  • Friday

    Friday: Rain. High near 45. South southwest wind 6 to 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 45 °F

    Rain

  • Friday Night

    Friday Night: Rain likely before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 34. Southwest wind 5 to 9 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

  • Saturday

    Saturday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 38. Northeast wind around 5 mph.
Christmas Day
Rain likely, mainly after noon. Mostly cloudy, with a high near 45. North northeast wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain likely, mainly after 4am. Mostly cloudy, with a steady temperature around 42. South southeast wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain. High near 45. South southwest wind 6 to 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain likely before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 34. Southwest wind 5 to 9 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
Partly sunny, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Mostly cloudy, with a high near 43.
Sunday Night
Mostly cloudy, with a low around 34.
Monday
Mostly cloudy, with a high near 46.
Monday Night
Mostly cloudy, with a low around 36.
Tuesday
Mostly cloudy, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
7:01 pm PST Dec 24, 2025
Forecast Valid:
11pm PST Dec 24, 2025-6pm PST Dec 31, 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