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

55°F

13°C

Humidity 82%
Wind Speed S 6 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 17 Oct 07:15 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: A 50 percent chance of rain between 11am and noon. Cloudy through mid morning, then gradual clearing, with a high near 57. South southwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 57 °F

    Chance Rain
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 42. Calm wind becoming east around 5 mph after midnight.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain after 11am. Cloudy, with a high near 53. South wind 3 to 6 mph.

    High: 53 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain. Low around 48. South wind 6 to 11 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 5pm. High near 56. South southwest wind 13 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 58.

    High: 58 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: A chance of rain between 11pm and midnight, then a chance of showers after midnight. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 56.

    High: 56 °F

    Chance
    Showers

Detailed Forecast

Today
A 50 percent chance of rain between 11am and noon. Cloudy through mid morning, then gradual clearing, with a high near 57. South southwest wind 5 to 7 mph becoming light and variable in the afternoon.
Tonight
Partly cloudy, with a low around 42. Calm wind becoming east around 5 mph after midnight.
Saturday
A 50 percent chance of rain after 11am. Cloudy, with a high near 53. South wind 3 to 6 mph.
Saturday Night
Rain. Low around 48. South wind 6 to 11 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers, with thunderstorms also possible after 5pm. High near 56. South southwest wind 13 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 58.
Monday Night
A chance of rain between 11pm and midnight, then a chance of showers after midnight. Mostly cloudy, with a low around 47.
Tuesday
A chance of showers. Mostly cloudy, with a high near 56.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 44.
Wednesday
A chance of showers. Mostly cloudy, with a high near 56.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 49.
Thursday
Rain likely. Cloudy, with a high near 59.
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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:
2:25 am PDT Oct 17, 2025
Forecast Valid:
7am PDT Oct 17, 2025-6pm PDT Oct 23, 2025
 
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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

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation