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

Record Breaking Temperatures and Critical Fire Weather

More than 200 record or near record maximum temperatures are forecast across the southern half of the U.S. through the end of this week before additional record temperatures center back over the Southwest U.S. into the Rockies this weekend. Widespread record breaking warmth, low humidity, and gusty winds will produce critical fire weather today in the central Rockies to Plains. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

50°F

10°C

Humidity 65%
Wind Speed S 13 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 25 Mar 09:53 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Rain and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then rain likely and possibly a thunderstorm after 5pm. High near 49. Southwest wind 13 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 49 °F

    Chance Rain
    then Showers

  • Tonight

    Tonight: A chance of rain, possibly mixing with snow after 11pm, then gradually ending. Partly cloudy, with a low around 36. South wind 8 to 14 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 36 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 52. South wind 6 to 8 mph.

    High: 52 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35. Southwest wind 5 to 7 mph becoming east northeast after midnight.

    Low: 35 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 57. East northeast wind 5 to 9 mph becoming north in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain, mainly after 11am. Mostly cloudy, with a high near 54.

    High: 54 °F

    Chance Rain

Detailed Forecast

Today
Rain and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then rain likely and possibly a thunderstorm after 5pm. High near 49. Southwest wind 13 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of rain, possibly mixing with snow after 11pm, then gradually ending. Partly cloudy, with a low around 36. South wind 8 to 14 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 52. South wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 35. Southwest wind 5 to 7 mph becoming east northeast after midnight.
Friday
Mostly sunny, with a high near 57. East northeast wind 5 to 9 mph becoming north in the afternoon.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 54.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 40.
Monday
A chance of rain. Mostly cloudy, with a high near 52.
Monday Night
A chance of rain. Mostly cloudy, with a low around 37.
Tuesday
A chance of rain. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
11:27 pm PDT Mar 24, 2026
Forecast Valid:
10am PDT Mar 25, 2026-6pm PDT Mar 31, 2026
 
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