Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

66°F

19°C

Humidity 63%
Wind Speed S 8 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Sep 11:05 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Widespread haze between noon and 1pm. Sunny, with a high near 76. Southwest wind around 7 mph.

    High: 76 °F

    Haze

  • Tonight

    Tonight: Rain, mainly after 1am.  Low around 58. South wind 8 to 10 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Mostly Cloudy
    then Rain

  • Sunday

    Sunday: Rain before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of rain after 2pm.  High near 66. South southwest wind 6 to 9 mph becoming north in the afternoon.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51. North northeast wind around 5 mph becoming light and variable  in the evening.

    Low: 51 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

Today
Widespread haze between noon and 1pm. Sunny, with a high near 76. Southwest wind around 7 mph.
Tonight
Rain, mainly after 1am. Low around 58. South wind 8 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Rain before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of rain after 2pm. High near 66. South southwest wind 6 to 9 mph becoming north in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Partly cloudy, with a low around 51. North northeast wind around 5 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 70. Light and variable wind.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 69.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 53.
Friday
A slight chance of rain. Partly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
8:01 am PDT Sep 20, 2025
11am PDT Sep 20, 2025-6pm PDT Sep 26, 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