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

34°F

1°C

Humidity 96%
Wind Speed SE 3 MPH
Barometer 29.83 in (1010.16 mb)
Dewpoint 33°F (1°C)
Visibility 2.00 mi
Last update 01 Jan 08:53 AM PST
Extended Forecast for

Newcastle WA

  • New Year's Day

    New Year's Day: A 50 percent chance of rain after 2pm. Patchy dense fog before 10am. Otherwise, cloudy, with a high near 44. South southeast wind around 6 mph becoming light and variable in the afternoon.

    High: 44 °F

    Slight Chance
    Rain and
    Patchy Dense
    Fog then
    Chance Rain

  • Tonight

    Tonight: Rain, mainly after 10pm. Low around 40. Southeast wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain

  • Friday

    Friday: Rain. High near 49. South wind around 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 49 °F

    Rain

  • Friday Night

    Friday Night: Rain likely. Mostly cloudy, with a low around 44. East wind around 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Rain Likely

  • Saturday

    Saturday: Rain. High near 51. Southeast wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 43. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Rain

  • Sunday

    Sunday: Rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.

    High: 50 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Rain Likely

  • Monday

    Monday: A chance of rain. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

Detailed Forecast

New Year's Day
A 50 percent chance of rain after 2pm. Patchy dense fog before 10am. Otherwise, cloudy, with a high near 44. South southeast wind around 6 mph becoming light and variable in the afternoon.
Tonight
Rain, mainly after 10pm. Low around 40. Southeast wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 49. South wind around 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain likely. Mostly cloudy, with a low around 44. East wind around 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain. High near 51. 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 43. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.
Sunday Night
Rain likely. Mostly cloudy, with a low around 41.
Monday
A chance of rain. Mostly cloudy, with a high near 47.
Monday Night
A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 39.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 45.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 38.
Wednesday
Rain likely. Mostly cloudy, with a high near 45.
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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:
7:01 am PST Jan 1, 2026
Forecast Valid:
9am PST Jan 1, 2026-6pm PST Jan 7, 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