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

45°F

7°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 02 Jan 11:35 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 49. South wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Rain Likely

  • Tonight

    Tonight: Rain, mainly after 4am. Low around 45. Southeast wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Rain

  • Saturday

    Saturday: Rain. High near 52. Southeast wind around 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 44. East southeast wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Rain

  • Sunday

    Sunday: Rain. High near 47. South wind 10 to 20 mph, with gusts as high as 30 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 40. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Rain Likely

  • Monday

    Monday: A 40 percent chance of rain, mainly before 4pm. Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Monday Night

    Monday Night: A chance of rain, mainly after 10pm. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 10am. Cloudy, with a high near 44.

    High: 44 °F

    Rain Likely

Detailed Forecast

Today
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 49. South wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly after 4am. Low around 45. Southeast wind 6 to 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 around 9 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Low around 44. East southeast wind 10 to 15 mph, with gusts as high as 23 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 20 mph, with gusts as high as 30 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 40. 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 45.
Monday Night
A chance of rain, mainly after 10pm. Mostly cloudy, with a low around 38.
Tuesday
Rain likely, mainly after 10am. 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
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.55°N 122.14°W (Elev. 538 ft)
Last Update:
7:00 am PST Jan 2, 2026
Forecast Valid:
11am PST Jan 2, 2026-6pm PST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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