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

46°F

8°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.37 in (1028.45 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 02 Nov 08:00 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 54. South southwest wind 3 to 7 mph.

    High: 54 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A 10 percent chance of rain after 4am. Cloudy, with a low around 43. Calm wind becoming north northeast around 6 mph after midnight.

    Low: 43 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Monday

    Monday: A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 53. Northeast wind 3 to 5 mph.

    High: 53 °F

    Chance Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 44. East wind 3 to 6 mph.

    Low: 44 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 56. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain. Low around 49. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain

  • Wednesday

    Wednesday: Rain. High near 58. Chance of precipitation is 100%.

    High: 58 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Cloudy, with a low around 48.

    Low: 48 °F

    Rain

  • Thursday

    Thursday: Rain. Cloudy, with a high near 56.

    High: 56 °F

    Rain

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 54. South southwest wind 3 to 7 mph.
Tonight
A 10 percent chance of rain after 4am. Cloudy, with a low around 43. Calm wind becoming north northeast around 6 mph after midnight.
Monday
A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 53. Northeast wind 3 to 5 mph.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 44. East wind 3 to 6 mph.
Tuesday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 56. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain. Low around 49. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain. High near 58. Chance of precipitation is 100%.
Wednesday Night
Rain. Cloudy, with a low around 48.
Thursday
Rain. Cloudy, with a high near 56.
Thursday Night
Rain. Cloudy, with a low around 48.
Friday
Rain. Mostly cloudy, with a high near 54.
Friday Night
A chance of rain. Mostly cloudy, with a low around 44.
Saturday
A chance of rain. Mostly cloudy, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
7:01 am PST Nov 2, 2025
Forecast Valid:
8am PST Nov 2, 2025-6pm PST Nov 8, 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