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.

Overcast

50°F

10°C

Humidity 81%
Wind Speed S 4 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 22 Nov 07:15 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: A slight chance of rain before 10am, then a chance of rain after 11am. Mostly cloudy, with a high near 53. South wind around 6 mph. Chance of precipitation is 40%.

    High: 53 °F

    Chance Rain

  • Tonight

    Tonight: Rain, mainly after 1am. Low around 47. South wind 7 to 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Chance Rain
    then Rain

  • Sunday

    Sunday: Rain. Temperature falling to around 44 by 5pm. South southwest wind around 8 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 50 °F⇓

    Rain

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 39. South southwest wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 10am. Partly sunny, with a high near 46. South southwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Rain Likely
    then Chance
    Rain

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of rain. Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain. Cloudy, with a low around 41.

    Low: 41 °F

    Rain

  • Wednesday

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

    High: 49 °F

    Rain

Detailed Forecast

Today
A slight chance of rain before 10am, then a chance of rain after 11am. Mostly cloudy, with a high near 53. South wind around 6 mph. Chance of precipitation is 40%.
Tonight
Rain, mainly after 1am. Low around 47. South wind 7 to 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. Temperature falling to around 44 by 5pm. South southwest wind around 8 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain likely. Mostly cloudy, with a low around 39. South southwest wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely, mainly before 10am. Partly sunny, with a high near 46. South southwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 45.
Tuesday Night
Rain. Cloudy, with a low around 41.
Wednesday
Rain. Cloudy, with a high near 49.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 45.
Thanksgiving Day
Rain likely. Mostly cloudy, with a high near 52.
Thursday Night
Rain likely. Mostly cloudy, with a low around 45.
Friday
Rain likely. Mostly cloudy, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
7:01 am PST Nov 22, 2025
Forecast Valid:
7am PST Nov 22, 2025-6pm PST Nov 28, 2025
 
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