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

Sinlaku Continues to Impact the Marianas; Severe Weather for the Central Plains and Northeast; Record Warmth for mid-Atlantic to Southeast

Sinlaku continues to affect the Marianas as it moves north through Friday. Meanwhile, severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley today and for the Central/Southern Plains on Friday. Considerable flooding impacts are ongoing in the Upper Great Lakes, and expected to continue through the weekend. Fire weather concerns persist in the Plains. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Partly Cloudy

46°F

8°C

Humidity 73%
Wind Speed S 5 MPH
Barometer 30.27 in (1025.06 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 16 Apr 10:53 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Sunny, with a high near 54. Southwest wind around 6 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. South southeast wind around 6 mph.

    Low: 38 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 56. South southeast wind around 5 mph becoming light and variable in the morning.

    High: 56 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41. North northwest wind around 5 mph becoming light and variable in the evening.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 64. Light and variable wind.

    High: 64 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A 30 percent chance of rain. Mostly cloudy, with a high near 65.

    High: 65 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of rain. Partly sunny, with a high near 66.

    High: 66 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 54. Southwest wind around 6 mph.
Tonight
Mostly cloudy, with a low around 38. South southeast wind around 6 mph.
Friday
Mostly sunny, with a high near 56. South southeast wind around 5 mph becoming light and variable in the morning.
Friday Night
Mostly cloudy, with a low around 41. North northwest wind around 5 mph becoming light and variable in the evening.
Saturday
Mostly cloudy, with a high near 64. Light and variable wind.
Saturday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 47.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 65.
Sunday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 48.
Monday
A slight chance of rain. Partly sunny, with a high near 66.
Monday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 49.
Tuesday
A chance of rain. Partly sunny, with a high near 59.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 47.
Wednesday
A chance of rain. Mostly cloudy, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
1:20 am PDT Apr 16, 2026
Forecast Valid:
11am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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