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.

Overcast

53°F

12°C

Humidity 39%
Wind Speed SW 13 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 25 Mar 12:53 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 49. Southwest wind around 11 mph, with gusts as high as 21 mph.

    High: 49 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 35. South wind 6 to 10 mph.

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 51. South southwest wind around 6 mph.

    High: 51 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35. South southwest wind around 5 mph becoming light and variable in the evening.

    Low: 35 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 57. Light and variable wind becoming north 5 to 7 mph in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Friday Night

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

    Low: 38 °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 40.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain, mainly after 11am. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 49. Southwest wind around 11 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 35. South wind 6 to 10 mph.
Thursday
Mostly sunny, with a high near 51. South southwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 35. South southwest wind around 5 mph becoming light and variable in the evening.
Friday
Mostly sunny, with a high near 57. Light and variable wind becoming north 5 to 7 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 53.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 40.
Monday
A chance of rain. Mostly cloudy, with a high near 50.
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
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
11:27 am PDT Mar 25, 2026
Forecast Valid:
1pm 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