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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Renton Municipal Airport (KRNT)

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

Clear

39°F

4°C

Humidity 80%
Wind Speed SSE 5 MPH
Barometer 30.38 in (1028.79 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 22 Mar 03:10 AM PDT
Extended Forecast for

Newcastle WA

Flood Warning March 22, 03:37am until March 23, 06:50am
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning March 22, 03:37am until March 23, 06:50am

    NOW until 6:50am Mon

    Flood Warning

  • Overnight

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 52. South southeast wind around 5 mph becoming calm.

    High: 52 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 36. North northeast wind 3 to 6 mph.

    Low: 36 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 53. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 53 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of rain after 11pm. Cloudy, with a low around 43. North wind around 6 mph becoming calm in the evening.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. High near 53. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 53 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 42. Chance of precipitation is 90%.

    Low: 42 °F

    Rain

  • Wednesday

    Wednesday: Rain. Mostly cloudy, with a high near 50.

    High: 50 °F

    Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 38. South southeast wind around 7 mph.
Sunday
Partly sunny, with a high near 52. South southeast wind around 5 mph becoming calm.
Sunday Night
Mostly cloudy, with a low around 36. North northeast wind 3 to 6 mph.
Monday
Partly sunny, with a high near 53. Calm wind becoming north northwest around 6 mph in the afternoon.
Monday Night
A 40 percent chance of rain after 11pm. Cloudy, with a low around 43. North wind around 6 mph becoming calm in the evening.
Tuesday
Rain. High near 53. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Low around 42. Chance of precipitation is 90%.
Wednesday
Rain. Mostly cloudy, with a high near 50.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
A chance of rain, mainly before 11am. Mostly sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 35.
Friday
Mostly sunny, with a high near 57.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
11:27 pm PDT Mar 21, 2026
Forecast Valid:
3am PDT Mar 22, 2026-6pm PDT Mar 28, 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