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

Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Mostly Cloudy

55°F

13°C

Humidity 71%
Wind Speed NNW 4 MPH
Barometer 29.73 in (1006.77 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 12 Apr 01:35 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 59. West northwest wind around 5 mph.

    High: 59 °F

    Mostly Sunny

  • Tonight

    Tonight: Rain likely, mainly after 9pm. Mostly cloudy, with a low around 45. West northwest wind 5 to 9 mph becoming south in the evening. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Rain Likely

  • Monday

    Monday: A 50 percent chance of rain. Mostly cloudy, with a high near 51. South southwest wind around 10 mph.

    High: 51 °F

    Chance Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 42. Southwest wind around 10 mph.

    Low: 42 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. High near 48. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain before 11pm, then rain likely, possibly mixed with snow. Low around 37. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow
    then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of rain and snow showers before 11am, then rain showers. Some thunder is also possible. High near 49. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 49 °F

    Rain/Snow
    then Showers

  • Wednesday Night

    Wednesday Night: A chance of rain before 11pm. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Thursday

    Thursday: A slight chance of rain after 11am. Mostly sunny, with a high near 53.

    High: 53 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 59. West northwest wind around 5 mph.
Tonight
Rain likely, mainly after 9pm. Mostly cloudy, with a low around 45. West northwest wind 5 to 9 mph becoming south in the evening. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A 50 percent chance of rain. Mostly cloudy, with a high near 51. South southwest wind around 10 mph.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42. Southwest wind around 10 mph.
Tuesday
Rain. High near 48. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain before 11pm, then rain likely, possibly mixed with snow. Low around 37. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow showers before 11am, then rain showers. Some thunder is also possible. High near 49. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
A chance of rain before 11pm. Mostly cloudy, with a low around 35.
Thursday
A slight chance of rain after 11am. Mostly sunny, with a high near 53.
Thursday Night
Partly cloudy, with a low around 39.
Friday
Partly sunny, with a high near 54.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 59.
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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:
11:27 am PDT Apr 12, 2026
Forecast Valid:
1pm PDT Apr 12, 2026-6pm PDT Apr 18, 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