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Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

52°F

11°C

Humidity 76%
Wind Speed S 6 MPH
Barometer 29.68 in (1005.08 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 11 Apr 05:00 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: A 30 percent chance of rain. Cloudy, with a low around 48. South wind around 5 mph.

    Low: 48 °F

    Chance Rain

  • Saturday

    Saturday: Rain, mainly before noon. High near 55. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 55 °F

    Rain then
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 9pm. Mostly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 59. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 59 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 47. West northwest wind 5 to 8 mph becoming south after midnight.

    Low: 47 °F

    Chance Rain

  • Monday

    Monday: A 40 percent chance of rain. Mostly cloudy, with a high near 54.

    High: 54 °F

    Chance Rain

  • Monday Night

    Monday Night: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain, mainly after 11am. Cloudy, with a high near 48.

    High: 48 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Rain

Detailed Forecast

Overnight
A 30 percent chance of rain. Cloudy, with a low around 48. South wind around 5 mph.
Saturday
Rain, mainly before noon. High near 55. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
A 20 percent chance of rain before 9pm. Mostly cloudy, with a low around 46. Calm wind.
Sunday
Mostly cloudy, with a high near 59. Calm wind becoming west northwest around 5 mph in the afternoon.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 47. West northwest wind 5 to 8 mph becoming south after midnight.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 54.
Monday Night
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 44.
Tuesday
Rain, mainly after 11am. Cloudy, with a high near 48.
Tuesday Night
Rain. Mostly cloudy, with a low around 38.
Wednesday
A chance of rain, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 51.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
A slight chance of rain. Mostly sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
11:27 pm PDT Apr 10, 2026
Forecast Valid:
5am PDT Apr 11, 2026-6pm PDT Apr 17, 2026
 
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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