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.

light rain,mist

43°F

6°C

Humidity 86%
Wind Speed SSE 10 MPH
Barometer 29.63 in (1003.39 mb)
Dewpoint 39°F (4°C)
Visibility 5.00 mi
Wind Chill37°F (3°C)
Last update 15 Mar 08:35 PM PDT
Extended Forecast for

Newcastle WA

  • Tonight

    Tonight: Rain. Low around 39. South wind 7 to 10 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Rain

  • Sunday

    Sunday: Rain. High near 48. South southwest wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain

  • Sunday Night

    Sunday Night: Rain, mainly before 9pm. Low around 38. South wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Rain then
    Chance Rain

  • Monday

    Monday: Rain, mainly after 11am. High near 49. South wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 49 °F

    Rain

  • Monday Night

    Monday Night: Rain, mainly before 11pm. Low around 36. West southwest wind 5 to 8 mph becoming calm. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 50 percent chance of rain. Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly after 11am. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain. Cloudy, with a low around 41.

    Low: 41 °F

    Rain

Detailed Forecast

Tonight
Rain. Low around 39. South wind 7 to 10 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 48. South southwest wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain, mainly before 9pm. Low around 38. South wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain, mainly after 11am. High near 49. South wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Rain, mainly before 11pm. Low around 36. West southwest wind 5 to 8 mph becoming calm. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 50 percent chance of rain. Partly sunny, with a high near 50.
Tuesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37.
Wednesday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 53.
Wednesday Night
Rain. Cloudy, with a low around 41.
Thursday
Rain. Cloudy, with a high near 51.
Thursday Night
Rain. Cloudy, with a low around 41.
Friday
Rain. Cloudy, with a high near 49.
Friday Night
Rain. Mostly cloudy, with a low around 40.
Saturday
Rain. Mostly cloudy, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
3:40 pm PDT Mar 15, 2025
Forecast Valid:
8pm PDT Mar 15, 2025-6pm PDT Mar 22, 2025
 
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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