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

63°F

17°C

Humidity 93%
Wind Speed SE 3 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 29 Sep 02:00 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Rain, mainly before 5pm, then showers and possibly a thunderstorm after 5pm. Patchy fog after 3pm. Steady temperature around 64. South southwest wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers and
    Patchy Fog

  • Tonight

    Tonight: Rain and thunderstorms likely before 3am, then a chance of rain. Patchy fog before 7pm. Otherwise, mostly cloudy, with a low around 51. South southeast wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Rain Likely
    and Patchy
    Fog then
    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 11am. Patchy fog before 9am. Otherwise, increasing clouds, with a high near 68. South wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday Night

    Tuesday Night: Rain. Low around 53. South southeast wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 53 °F

    Rain

  • Wednesday

    Wednesday: Rain before 5pm, then showers and possibly a thunderstorm after 5pm. High near 64. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then rain after 8pm. Low around 52. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers

  • Thursday

    Thursday: Rain. High near 63. Chance of precipitation is 80%.

    High: 63 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain

  • Friday

    Friday: A chance of rain. Partly sunny, with a high near 64.

    High: 64 °F

    Chance Rain

Detailed Forecast

This Afternoon
Rain, mainly before 5pm, then showers and possibly a thunderstorm after 5pm. Patchy fog after 3pm. Steady temperature around 64. South southwest wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and thunderstorms likely before 3am, then a chance of rain. Patchy fog before 7pm. Otherwise, mostly cloudy, with a low around 51. South southeast wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Rain likely, mainly after 11am. Patchy fog before 9am. Otherwise, increasing clouds, with a high near 68. South wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain. Low around 53. South southeast wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain before 5pm, then showers and possibly a thunderstorm after 5pm. High near 64. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then rain after 8pm. Low around 52. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain. High near 63. Chance of precipitation is 80%.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 51.
Friday
A chance of rain. Partly sunny, with a high near 64.
Friday Night
A chance of rain. Mostly cloudy, with a low around 51.
Saturday
A chance of rain. Partly sunny, with a high near 62.
Saturday Night
A slight chance of rain. Partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
Last Update:
8:00 am PDT Sep 29, 2025
Forecast Valid:
2pm PDT Sep 29, 2025-6pm PDT Oct 5, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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