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

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

73°F

23°C

Humidity 56%
Wind Speed N 4 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 01 Aug 08:53 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Mostly clear, with a low around 58. Light northeast wind.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Widespread haze after 4pm. Mostly sunny, with a high near 77. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 77 °F

    Partly Sunny
    then Haze

  • Saturday Night

    Saturday Night: Widespread haze before 9pm. Partly cloudy, with a low around 56. North wind 3 to 5 mph.

    Low: 56 °F

    Haze then
    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 73. South wind around 5 mph becoming west southwest in the afternoon.

    High: 73 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. West wind around 6 mph becoming south after midnight.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 58. Light northeast wind.
Saturday
Widespread haze after 4pm. Mostly sunny, with a high near 77. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night
Widespread haze before 9pm. Partly cloudy, with a low around 56. North wind 3 to 5 mph.
Sunday
Mostly cloudy, with a high near 73. South wind around 5 mph becoming west southwest in the afternoon.
Sunday Night
Mostly cloudy, with a low around 55. West wind around 6 mph becoming south after midnight.
Monday
Mostly cloudy, with a high near 72.
Monday Night
Mostly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 74.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 75.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 60.
Thursday
A chance of rain. Mostly cloudy, with a high near 72.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 60.
Friday
A slight chance of rain. Partly sunny, with a high near 75.
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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:
8:01 pm PDT Aug 1, 2025
Forecast Valid:
10pm PDT Aug 1, 2025-6pm PDT Aug 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