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

64°F

18°C

Humidity 67%
Wind Speed NNW 5 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 08 Oct 02:00 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 68. Calm wind.

    High: 68 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 52. Light and variable wind becoming south 8 to 13 mph after midnight. Winds could gust as high as 22 mph.

    Low: 52 °F

    Increasing
    Clouds

  • Friday

    Friday: Rain, mainly before 1pm. Steady temperature around 56. South southwest wind 9 to 14 mph becoming light and variable in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Rain then
    Rain Likely

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly between 7pm and 1am. Cloudy, with a low around 46. Light and variable wind becoming south 5 to 8 mph in the evening.

    Low: 46 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 56. South wind around 6 mph becoming calm.

    High: 56 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 61.

    High: 61 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 68. Calm wind.
Tonight
Increasing clouds, with a low around 52. Light and variable wind becoming south 8 to 13 mph after midnight. Winds could gust as high as 22 mph.
Friday
Rain, mainly before 1pm. Steady temperature around 56. South southwest wind 9 to 14 mph becoming light and variable in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 50 percent chance of rain, mainly between 7pm and 1am. Cloudy, with a low around 46. Light and variable wind becoming south 5 to 8 mph in the evening.
Saturday
A 20 percent chance of rain before 11am. Partly sunny, with a high near 56. South wind around 6 mph becoming calm.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 40.
Columbus Day
Sunny, with a high near 61.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
A slight chance of rain. Partly sunny, with a high near 59.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 48.
Wednesday
A slight chance of rain. Partly sunny, with a high near 59.
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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:
12:25 pm PDT Oct 8, 2026
Forecast Valid:
2pm PDT Oct 8, 2026-6pm PDT Oct 14, 2026
 
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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