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

53°F

12°C

Humidity 79%
Wind Speed SSE 4 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 08 Oct 05:53 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: A slight chance of rain before 10am, then a slight chance of rain after 3pm. Cloudy through mid morning, then gradual clearing, with a high near 61. South southeast wind around 6 mph becoming west southwest in the afternoon. Chance of precipitation is 20%.

    High: 61 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain likely, mainly after 3am. Increasing clouds, with a low around 49. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Slight Chance
    Rain then
    Rain Likely

  • Thursday

    Thursday: A 50 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 61. Calm wind becoming north around 5 mph in the afternoon.

    High: 61 °F

    Chance Rain
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 51. North wind around 5 mph becoming light and variable after midnight.

    Low: 51 °F

    Chance Rain

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 60. Light and variable wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Rain Likely

  • Friday Night

    Friday Night: Rain likely. Mostly cloudy, with a low around 50. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Rain Likely

  • Saturday

    Saturday: Rain. High near 57. Chance of precipitation is 80%.

    High: 57 °F

    Rain

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Rain Likely

  • Sunday

    Sunday: Rain likely. Mostly cloudy, with a high near 56.

    High: 56 °F

    Rain Likely

Detailed Forecast

Today
A slight chance of rain before 10am, then a slight chance of rain after 3pm. Cloudy through mid morning, then gradual clearing, with a high near 61. South southeast wind around 6 mph becoming west southwest in the afternoon. Chance of precipitation is 20%.
Tonight
Rain likely, mainly after 3am. Increasing clouds, with a low around 49. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 50 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 61. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
A 50 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 51. North wind around 5 mph becoming light and variable after midnight.
Friday
Rain likely. Mostly cloudy, with a high near 60. Light and variable wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain likely. Mostly cloudy, with a low around 50. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 57. Chance of precipitation is 80%.
Saturday Night
Rain likely. Mostly cloudy, with a low around 47.
Sunday
Rain likely. Mostly cloudy, with a high near 56.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 44.
Columbus Day
A chance of rain. Partly sunny, with a high near 59.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 44.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
2:25 am PDT Oct 8, 2025
Forecast Valid:
6am PDT Oct 8, 2025-6pm PDT Oct 14, 2025
 
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