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

54°F

12°C

Humidity 93%
Wind Speed SE 3 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 09 Oct 01:15 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. East southeast wind 5 to 11 mph becoming south. Winds could gust as high as 21 mph.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: Rain, mainly before 2pm. Steady temperature around 55. 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 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 11pm, then a slight chance of rain after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 46. Light and variable wind becoming southeast 5 to 8 mph in the evening. Chance of precipitation is 40%.

    Low: 46 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 56. Calm wind becoming north around 6 mph in the afternoon.

    High: 56 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42. North wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. East southeast wind 5 to 11 mph becoming south. Winds could gust as high as 21 mph.
Friday
Rain, mainly before 2pm. Steady temperature around 55. 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 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A chance of rain before 11pm, then a slight chance of rain after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 46. Light and variable wind becoming southeast 5 to 8 mph in the evening. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 56. Calm wind becoming north around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 42. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 41.
Columbus Day
Sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 49.
Wednesday
A chance of rain. Mostly cloudy, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 62.
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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:
11:26 pm PDT Oct 8, 2026
Forecast Valid:
1am PDT Oct 9, 2026-6pm PDT Oct 15, 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