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

61°F

16°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 07 Sep 06:35 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: A 30 percent chance of showers after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 71. South wind 3 to 5 mph.

    High: 71 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 56. Light and variable wind.

    Low: 56 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny through mid morning, then becoming cloudy, with a high near 72. Light west northwest wind.

    High: 72 °F

    Becoming
    Cloudy

  • Monday Night

    Monday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 58. Light north wind.

    Low: 58 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 67. Light west southwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Partly sunny, with a high near 71.

    High: 71 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers after 11am. Partly sunny, with a high near 73.

    High: 73 °F

    Slight Chance
    Showers

Detailed Forecast

Today
A 30 percent chance of showers after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 71. South wind 3 to 5 mph.
Tonight
A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 56. Light and variable wind.
Monday
Mostly sunny through mid morning, then becoming cloudy, with a high near 72. Light west northwest wind.
Monday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 58. Light north wind.
Tuesday
Showers likely. Cloudy, with a high near 67. Light west southwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 40 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 57.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
A slight chance of showers after 11am. Partly sunny, with a high near 73.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 57.
Friday
A slight chance of showers. Partly sunny, with a high near 73.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 58.
Saturday
A chance of showers. Partly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
2:25 am PDT Sep 7, 2025
Forecast Valid:
6am PDT Sep 7, 2025-6pm PDT Sep 13, 2025
 
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