Active Spring Like Pattern Across the Country

A frontal boundary will slowly move eastward and clear most of the eastern seaboard by Sunday. Showers and thunderstorms, some severe, will accompany this front alongside the threat of heavy rainfall; These threats may linger along the Gulf Coast states into early next week. Meanwhile, record spring-like warmth is forecast, mainly east of the Mississippi River, this weekend into next week. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Overcast

52°F

11°C

Humidity 81%
Wind Speed S 10 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 08 Mar 04:00 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Rain.  Steady temperature around 49. South southwest wind around 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Rain

  • Sunday

    Sunday: Rain, mainly before 4pm.  Temperature falling to around 44 by 5pm. Southwest wind 7 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 50 °F

    Rain then
    Rain Likely

  • Sunday Night

    Sunday Night: Rain likely before 11pm, then rain and snow likely.  Mostly cloudy, with a low around 34. East northeast wind 6 to 8 mph becoming south southwest after midnight.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely

  • Monday

    Monday: Snow before 2pm, then rain and snow.  High near 43. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 43 °F

    Snow then
    Rain/Snow

  • Monday Night

    Monday Night: Rain and snow, becoming all snow after 8pm.  Low around 34. South wind 8 to 10 mph.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    then Snow
    Likely

  • Tuesday

    Tuesday: Snow before 2pm, then rain, possibly mixed with snow.  High near 43. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 43 °F

    Snow then
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow.  Low around 37. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain, possibly mixed with snow, becoming all rain after 11am.  Cloudy, with a high near 48.

    High: 48 °F

    Rain/Snow
    then Rain

  • Wednesday Night

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

    Low: 41 °F

    Rain

Detailed Forecast

Overnight
Rain. Steady temperature around 49. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain, mainly before 4pm. Temperature falling to around 44 by 5pm. Southwest wind 7 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain likely before 11pm, then rain and snow likely. Mostly cloudy, with a low around 34. East northeast wind 6 to 8 mph becoming south southwest after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
Snow before 2pm, then rain and snow. High near 43. South southwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Monday Night
Rain and snow, becoming all snow after 8pm. Low around 34. South wind 8 to 10 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday
Snow before 2pm, then rain, possibly mixed with snow. High near 43. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday Night
Rain, possibly mixed with snow. Low around 37. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday
Rain, possibly mixed with snow, becoming all rain after 11am. Cloudy, with a high near 48.
Wednesday Night
Rain. Cloudy, with a low around 41.
Thursday
Rain before 8am, then rain, possibly mixed with snow between 8am and 11am, then rain after 11am. Cloudy, with a high near 44.
Thursday Night
Rain and snow. Cloudy, with a low around 36.
Friday
Rain and snow. Cloudy, with a high near 45.
Friday Night
Rain and snow likely. Mostly cloudy, with a low around 36.
Saturday
Rain and snow likely. Mostly cloudy, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
1:25 am PST Mar 8, 2026
4am PDT Mar 8, 2026-6pm PDT Mar 14, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database