Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Plains to the Upper Midwest

A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S and linger through much of the work week. Numerous daily record highs and warm lows are likely. Severe thunderstorms are possible from the southern Plains through the Upper Mississippi Valley. Fire weather concerns are expected to persist across the Four Corners region. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

57°F

14°C

Humidity 76%
Wind Speed N 0 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 23 Jun 02:48 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 54. Light south wind.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 76. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. Light and variable wind.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 78. Calm wind becoming west around 5 mph in the afternoon.

    High: 78 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 11pm.  Mostly cloudy, with a low around 57. Light and variable wind becoming south southwest around 6 mph after midnight.

    Low: 57 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers, mainly before 11am.  Cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers.  Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 54. Light south wind.
Monday
Mostly sunny, with a high near 76. Calm wind becoming west northwest around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 55. Light and variable wind.
Tuesday
Increasing clouds, with a high near 78. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 57. Light and variable wind becoming south southwest around 6 mph after midnight.
Wednesday
A 40 percent chance of showers, mainly before 11am. Cloudy, with a high near 69.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 56.
Thursday
A chance of showers. Mostly cloudy, with a high near 69.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 56.
Friday
A slight chance of showers before 11am. Mostly cloudy, with a high near 71.
Friday Night
Mostly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
3:40 am PDT Jun 23, 2025
3am PDT Jun 23, 2025-6pm PDT Jun 29, 2025
 
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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