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

46°F

8°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 12 Nov 04:15 AM PST
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Rain likely. Cloudy, with a low around 45. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 10am. Mostly cloudy, with a high near 58. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 51. East southeast wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Rain

  • Thursday

    Thursday: Rain. High near 58. South wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 47. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Friday

    Friday: Rain. High near 53. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Rain

  • Friday Night

    Friday Night: Rain. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Rain

  • Saturday

    Saturday: Rain. Cloudy, with a high near 56.

    High: 56 °F

    Rain

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Rain Likely

Detailed Forecast

Overnight
Rain likely. Cloudy, with a low around 45. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 58. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain. Low around 51. East southeast wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain. High near 58. South wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain. Low around 47. South wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 53. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain. Low around 48. Chance of precipitation is 80%.
Saturday
Rain. Cloudy, with a high near 56.
Saturday Night
Rain likely. Mostly cloudy, with a low around 50.
Sunday
Rain. Mostly cloudy, with a high near 56.
Sunday Night
Rain likely. Mostly cloudy, with a low around 43.
Monday
A chance of rain. Partly sunny, with a high near 51.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 41.
Tuesday
A chance of rain. Mostly cloudy, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
1:25 am PST Nov 12, 2025
Forecast Valid:
4am PST Nov 12, 2025-6pm PST Nov 18, 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