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.

Mist

43°F

6°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Last update 02 Jan 07:00 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 48. South southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Rain Likely

  • Tonight

    Tonight: Rain, mainly after 4am. Low around 44. East southeast wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Rain

  • Saturday

    Saturday: Rain. High near 52. Southeast wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 43. Southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Rain

  • Sunday

    Sunday: Rain. High near 47. South wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Rain Likely

  • Monday

    Monday: A 40 percent chance of rain, mainly before 4pm. Mostly cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

  • Monday Night

    Monday Night: A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow before 10am, then rain likely. Cloudy, with a high near 44.

    High: 44 °F

    Rain/Snow
    Likely then
    Rain Likely

Detailed Forecast

Today
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 48. South southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain, mainly after 4am. Low around 44. East southeast wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 52. Southeast wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Low around 43. Southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 47. South wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A 40 percent chance of rain, mainly before 4pm. Mostly cloudy, with a high near 44.
Monday Night
A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 37.
Tuesday
A chance of rain and snow before 10am, then rain likely. Cloudy, with a high near 44.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 37.
Wednesday
Rain likely. Mostly cloudy, with a high near 43.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 35.
Thursday
A chance of rain and snow. Partly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
7:00 am PST Jan 2, 2026
Forecast Valid:
7am PST Jan 2, 2026-6pm PST Jan 8, 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