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

Fire Weather Concerns; Record Warmth Spreads

The Plains to the mid-Mississippi Valley continue with warm and dry conditions. Any fires that initiate could spread quickly. The warm temperatures will expand across the Southern Plains into the Southwest where numerous records are expected through the weekend. Meanwhile, a cold front will move southward across the northern Plains and Great Lakes region where some snow will develop this weekend. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

46°F

8°C

Humidity 75%
Wind Speed NNW 11 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 28 Feb 07:20 PM PST
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. North northeast wind around 6 mph.

    Low: 36 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 55. North wind 3 to 5 mph.

    High: 55 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Light and variable wind.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 56. Light and variable wind becoming south southwest around 5 mph in the afternoon.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 44. South wind around 6 mph.

    Low: 44 °F

    Partly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: Rain, mainly after 10am. High near 51. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 45. Chance of precipitation is 100%.

    Low: 45 °F

    Rain

  • Wednesday

    Wednesday: Rain. Cloudy, with a high near 49.

    High: 49 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. North northeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 55. North wind 3 to 5 mph.
Sunday Night
Mostly clear, with a low around 36. Light and variable wind.
Monday
Mostly sunny, with a high near 56. Light and variable wind becoming south southwest around 5 mph in the afternoon.
Monday Night
A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 44. South wind around 6 mph.
Tuesday
Rain, mainly after 10am. High near 51. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain. Low around 45. Chance of precipitation is 100%.
Wednesday
Rain. Cloudy, with a high near 49.
Wednesday Night
Rain. Mostly cloudy, with a low around 42.
Thursday
Rain. Mostly cloudy, with a high near 48.
Thursday Night
Rain likely. Mostly cloudy, with a low around 42.
Friday
Rain. Cloudy, with a high near 49.
Friday Night
Rain. Cloudy, with a low around 45.
Saturday
Rain. Cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
7:00 pm PST Feb 28, 2026
Forecast Valid:
7pm PST Feb 28, 2026-6pm PST Mar 7, 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