Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

66°F

19°C

Humidity 68%
Wind Speed NNW 9 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 10 Sep 11:30 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Mostly cloudy, with a high near 67. Calm wind.

    High: 67 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 65. South wind around 6 mph becoming calm  in the afternoon.

    High: 65 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Cloudy

  • Saturday

    Saturday: A chance of rain between 11am and 5pm, then showers likely and possibly a thunderstorm after 5pm.  Mostly cloudy, with a high near 67. Light northwest wind.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Chance Rain
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm, then rain after 8pm.  Low around 52. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers

  • Sunday

    Sunday: Rain likely, mainly before 11am.  Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A slight chance of rain before 11pm.  Mostly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 67. Calm wind.
Tonight
Mostly cloudy, with a low around 53. Calm wind becoming south 5 to 8 mph after midnight.
Friday
Mostly cloudy, with a high near 65. South wind around 6 mph becoming calm in the afternoon.
Friday Night
Cloudy, with a low around 52. Calm wind.
Saturday
A chance of rain between 11am and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 67. Light northwest wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm, then rain after 8pm. Low around 52. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Sunday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 52.
Monday
Partly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 75.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
11:26 am PDT Sep 10, 2026
11am PDT Sep 10, 2026-6pm PDT Sep 16, 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