National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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 86%
Wind Speed SSE 5 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 07 Mar 10:53 AM PST
Extended Forecast for

Newcastle WA

  • Today

    Today: Rain likely, mainly between 2pm and 4pm. Mostly cloudy, with a high near 54. South southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Rain Likely

  • Tonight

    Tonight: Rain, mainly after midnight. Low around 47. South southwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Chance Rain
    then Rain

  • Sunday

    Sunday: Rain. High near 51. South southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely before 4am, then rain and snow likely. Mostly cloudy, with a low around 36. South southwest wind around 7 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Rain and snow likely before 10am, then rain between 10am and 4pm, then rain, possibly mixed with snow after 4pm. High near 46. Southwest wind 7 to 9 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow

  • Monday Night

    Monday Night: Rain and snow, becoming all snow after 10pm. Low around 34. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    then Snow

  • Tuesday

    Tuesday: Snow before 10am, then rain, possibly mixed with snow between 10am and 1pm, then rain after 1pm. High near 46. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain before 10pm, then rain, possibly mixed with snow. Cloudy, with a low around 38.

    Low: 38 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain. Cloudy, with a high near 48.

    High: 48 °F

    Rain

Detailed Forecast

Today
Rain likely, mainly between 2pm and 4pm. Mostly cloudy, with a high near 54. South southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly after midnight. Low around 47. South southwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 51. South southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain likely before 4am, then rain and snow likely. Mostly cloudy, with a low around 36. South southwest wind around 7 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
Rain and snow likely before 10am, then rain between 10am and 4pm, then rain, possibly mixed with snow after 4pm. High near 46. Southwest wind 7 to 9 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday Night
Rain and snow, becoming all snow after 10pm. Low around 34. Chance of precipitation is 80%. Little or no snow accumulation expected.
Tuesday
Snow before 10am, then rain, possibly mixed with snow between 10am and 1pm, then rain after 1pm. High near 46. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday Night
Rain before 10pm, then rain, possibly mixed with snow. Cloudy, with a low around 38.
Wednesday
Rain. Cloudy, with a high near 48.
Wednesday Night
Rain before 10pm, then rain, possibly mixed with snow. Cloudy, with a low around 42.
Thursday
Rain, possibly mixed with snow. Cloudy, with a high near 49.
Thursday Night
Rain and snow. Cloudy, with a low around 39.
Friday
Rain and snow. Cloudy, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
7:01 am PST Mar 7, 2026
Forecast Valid:
11am PST Mar 7, 2026-6pm PDT Mar 13, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation