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

55°F

13°C

Humidity 66%
Wind Speed SSE 4 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 17 Jun 07:53 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Mostly sunny, with a high near 73. Southwest wind around 6 mph.

    High: 73 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 56. South wind around 7 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before 11am. Partly sunny, with a high near 68. Southwest wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 49. West wind 5 to 8 mph becoming light and variable after midnight.

    Low: 49 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Juneteenth

    Juneteenth: Partly sunny, with a high near 68. Light and variable wind becoming northwest around 6 mph in the morning.

    High: 68 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after 11am. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers, mainly before 11am. Mostly cloudy, with a high near 59.

    High: 59 °F

    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 73. Southwest wind around 6 mph.
Tonight
A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 56. South wind around 7 mph.
Wednesday
Showers likely, mainly before 11am. Partly sunny, with a high near 68. Southwest wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 49. West wind 5 to 8 mph becoming light and variable after midnight.
Juneteenth
Partly sunny, with a high near 68. Light and variable wind becoming northwest around 6 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Showers likely, mainly after 11am. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.
Friday Night
Showers likely. Mostly cloudy, with a low around 49.
Saturday
Showers, mainly before 11am. Mostly cloudy, with a high near 59.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 51.
Sunday
A chance of showers. Mostly cloudy, with a high near 67.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 52.
Monday
A slight chance of showers. Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
9:40 am PDT Jun 17, 2025
Forecast Valid:
10am PDT Jun 17, 2025-6pm PDT Jun 23, 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