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 100%
Wind Speed N 0 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Last update 02 Jan 05:20 PM PST
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Rain likely. Cloudy, with a high near 50. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Rain Likely

  • Tonight

    Tonight: Rain, mainly after 4am. Low around 45. East southeast wind 5 to 9 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 likely, mainly after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 53. South southeast wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Rain Likely

  • Saturday Night

    Saturday Night: Rain. Low around 45. South southeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Rain

  • Sunday

    Sunday: Rain. High near 49. South wind 10 to 17 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: 49 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly before 4am. 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 10am. Partly sunny, with a high near 45.

    High: 45 °F

    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly after 4am. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain. Cloudy, with a high near 44.

    High: 44 °F

    Rain

Detailed Forecast

This Afternoon
Rain likely. Cloudy, with a high near 50. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly after 4am. Low around 45. East southeast wind 5 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely, mainly after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 53. South southeast wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain. Low around 45. South southeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 49. South wind 10 to 17 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, mainly before 4am. 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 10am. Partly sunny, with a high near 45.
Monday Night
Rain likely, mainly after 4am. Mostly cloudy, with a low around 38.
Tuesday
Rain. Cloudy, with a high near 44.
Tuesday Night
Rain. Mostly cloudy, with a low around 37.
Wednesday
Rain likely. Mostly cloudy, with a high near 45.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 36.
Thursday
A chance of rain. Mostly cloudy, with a high near 44.
Thursday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 36.
Friday
A slight chance of rain and snow. Mostly cloudy, with a high near 46.
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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:
1:25 pm PST Jan 2, 2026
Forecast Valid:
5pm PST Jan 2, 2026-6pm PST Jan 9, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation