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

70°F

21°C

Humidity 51%
Wind Speed N 4 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 07 Oct 01:53 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Sunny, with a high near 72. Light west wind.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 48. Calm wind becoming east northeast around 6 mph after midnight.

    Low: 48 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A 20 percent chance of rain. Cloudy, then gradually becoming mostly sunny, with a high near 59. Southwest wind 6 to 8 mph.

    High: 59 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 45. Southwest wind around 5 mph becoming light and variable after midnight.

    Low: 45 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain, mainly before 11am. Partly sunny, with a high near 61. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 61 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

  • Friday

    Friday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.

    High: 60 °F

    Rain Likely

  • Friday Night

    Friday Night: Rain likely, mainly after 11pm. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Rain Likely

  • Saturday

    Saturday: Rain. Mostly cloudy, with a high near 57.

    High: 57 °F

    Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 72. Light west wind.
Tonight
Increasing clouds, with a low around 48. Calm wind becoming east northeast around 6 mph after midnight.
Wednesday
A 20 percent chance of rain. Cloudy, then gradually becoming mostly sunny, with a high near 59. Southwest wind 6 to 8 mph.
Wednesday Night
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 45. Southwest wind around 5 mph becoming light and variable after midnight.
Thursday
A 40 percent chance of rain, mainly before 11am. Partly sunny, with a high near 61. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Thursday Night
A 40 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 47.
Friday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.
Friday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 49.
Saturday
Rain. Mostly cloudy, with a high near 57.
Saturday Night
Rain likely. Mostly cloudy, with a low around 45.
Sunday
A chance of rain. Mostly cloudy, with a high near 57.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 43.
Columbus Day
A slight chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
8:00 am PDT Oct 7, 2025
Forecast Valid:
2pm PDT Oct 7, 2025-6pm PDT Oct 13, 2025
 
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Additional Resources

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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