Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

61°F

16°C

Humidity 77%
Wind Speed N 11 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 31 Aug 03:00 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Partly cloudy, with a low around 52. North northeast wind around 5 mph.

    Low: 52 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. North northwest wind 5 to 7 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. North wind around 5 mph becoming calm  in the evening.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 71. Light and variable wind becoming southwest 5 to 7 mph in the morning.

    High: 71 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly after 11pm.  Mostly cloudy, with a low around 55. South wind around 8 mph.

    Low: 55 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 11am.  Mostly cloudy, with a high near 66. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain.  Low around 52. Chance of precipitation is 90%.

    Low: 52 °F

    Rain

  • Thursday

    Thursday: Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am.  Mostly cloudy, with a high near 64.

    High: 64 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of rain, mainly before 11pm.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 52. North northeast wind around 5 mph.
Monday
Mostly sunny, with a high near 73. North northwest wind 5 to 7 mph.
Monday Night
Partly cloudy, with a low around 54. North wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 71. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Tuesday Night
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 55. South wind around 8 mph.
Wednesday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 66. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 52. Chance of precipitation is 90%.
Thursday
Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 64.
Thursday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 50.
Friday
A chance of rain. Partly sunny, with a high near 66.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 51.
Saturday
A slight chance of rain. Partly sunny, with a high near 69.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
A slight chance of rain. Partly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
11:26 pm PDT Aug 30, 2026
3am PDT Aug 31, 2026-6pm PDT Sep 6, 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