Record Heat Remains in Place This Week; Precipitation and Windy Conditions in the Northwest

Record warmth will persist across portions of California, the Southwest U.S., the central Great Basin and spread across the central U.S. for the middle of the week. High temperatures will approach 90 from Texas to the Ohio Valley. A moist frontal system will bring lowland rain, high elevation mountain snow, and breezy winds to the Pacific Northwest into the Northern Rockies through Wednesday. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

47°F

8°C

Humidity 70%
Wind Speed NNW 4 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 23 Mar 09:53 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Rain likely, mainly after 5am.  Cloudy, with a low around 42. Light and variable wind.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Cloudy then
    Rain Likely

  • Tuesday

    Tuesday: Rain, mainly before 4pm.  High near 52. South southwest wind 6 to 16 mph, with gusts as high as 31 mph.  Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 52 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain.  Low around 40. South southwest wind 13 to 18 mph, with gusts as high as 32 mph.  Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Rain

  • Wednesday

    Wednesday: Rain.  High near 47. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 11pm, then a chance of rain and snow.  Mostly cloudy, with a low around 35. South wind 9 to 13 mph, with gusts as high as 21 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow before 11am.  Mostly sunny, with a high near 51. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 51 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain likely, mainly after 5am. Cloudy, with a low around 42. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain, mainly before 4pm. High near 52. South southwest wind 6 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday Night
Rain. Low around 40. South southwest wind 13 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain. High near 47. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely before 11pm, then a chance of rain and snow. Mostly cloudy, with a low around 35. South wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow before 11am. Mostly sunny, with a high near 51. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 57.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
A slight chance of rain. Mostly cloudy, with a high near 60.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 45.
Monday
A chance of rain. Mostly cloudy, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
2:16 pm PDT Mar 23, 2026
10pm PDT Mar 23, 2026-6pm PDT Mar 30, 2026
 
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Additional Resources

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Hourly Weather Forecast

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