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

Renton Municipal Airport (KRNT)

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

Rain

46°F

8°C

Humidity 79%
Wind Speed N 0 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 40°F (4°C)
Visibility 8.00 mi
Last update 01 Dec 03:53 PM PST
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A 30 percent chance of rain. Partly sunny, with a high near 45. Calm wind.

    High: 45 °F

    Chance Rain

  • Tonight

    Tonight: Rain likely, mainly between 10pm and 3am. Mostly cloudy, with a low around 40. South southeast wind 3 to 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Rain Likely

  • Tuesday

    Tuesday: A 30 percent chance of rain before 8am. Mostly cloudy, with a high near 47. Calm wind.

    High: 47 °F

    Chance Rain
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 45. Calm wind.

    High: 45 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain, mainly after 10am. High near 47. Chance of precipitation is 80%.

    High: 47 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Cloudy, with a low around 44.

    Low: 44 °F

    Rain

  • Friday

    Friday: Rain. Cloudy, with a high near 54.

    High: 54 °F

    Rain

Detailed Forecast

This Afternoon
A 30 percent chance of rain. Partly sunny, with a high near 45. Calm wind.
Tonight
Rain likely, mainly between 10pm and 3am. Mostly cloudy, with a low around 40. South southeast wind 3 to 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 30 percent chance of rain before 8am. Mostly cloudy, with a high near 47. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 36. Calm wind.
Wednesday
Mostly cloudy, with a high near 45. Calm wind.
Wednesday Night
A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 37.
Thursday
Rain, mainly after 10am. High near 47. Chance of precipitation is 80%.
Thursday Night
Rain. Cloudy, with a low around 44.
Friday
Rain. Cloudy, with a high near 54.
Friday Night
Rain. Cloudy, with a low around 47.
Saturday
Rain. Mostly cloudy, with a high near 52.
Saturday Night
Rain. Mostly cloudy, with a low around 45.
Sunday
Rain. Cloudy, with a high near 51.
Sunday Night
Rain likely. Mostly cloudy, with a low around 45.
Monday
Rain. Cloudy, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
1:26 pm PST Dec 1, 2025
Forecast Valid:
4pm PST Dec 1, 2025-6pm PST Dec 8, 2025
 
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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