National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

52°F

11°C

Humidity 71%
Wind Speed N 4 MPH
Barometer 30.25 in (1024.38 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 17 Oct 11:53 PM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Mostly clear, with a low around 43. Northeast wind around 6 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 57. North wind 3 to 6 mph.

    High: 57 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy during the early evening, then becoming cloudy, with a low around 45. Light northeast wind.

    Low: 45 °F

    Becoming
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 57. Calm wind.

    High: 57 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 43. Northeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 57. North wind 3 to 6 mph.
Sunday Night
Partly cloudy during the early evening, then becoming cloudy, with a low around 45. Light northeast wind.
Monday
Mostly cloudy, with a high near 57. Calm wind.
Monday Night
Mostly cloudy, with a low around 44. Calm wind becoming north northeast around 5 mph after midnight.
Tuesday
Mostly sunny, with a high near 58.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
A slight chance of rain after 11am. Partly sunny, with a high near 56.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 44.
Friday
A slight chance of rain. Partly sunny, with a high near 55.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 42.
Saturday
A slight chance of rain. Partly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
11:26 pm PDT Oct 17, 2026
Forecast Valid:
12am PDT Oct 18, 2026-6pm PDT Oct 24, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation