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.

Overcast

46°F

8°C

Humidity 75%
Wind Speed N 6 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 21 Mar 12:55 AM PDT
Extended Forecast for

3 Miles ESE Newcastle WA

Flood Watch March 21, 01:21am until March 21, 05:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch March 21, 01:21am until March 21, 05:00pm

    NOW until 5:00pm Sat

    Flood Watch

  • Overnight

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 44. North wind 5 to 8 mph.

    High: 44 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 35. Light and variable wind becoming south 5 to 9 mph in the evening.

    Low: 35 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of snow before 11am. Partly sunny, with a high near 48. South wind 6 to 8 mph becoming northwest in the afternoon.

    High: 48 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34. North northeast wind around 6 mph.

    Low: 34 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Monday Night

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

    Low: 40 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. Cloudy, with a high near 50.

    High: 50 °F

    Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. North wind around 8 mph.
Saturday
Partly sunny, with a high near 44. North wind 5 to 8 mph.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 35. Light and variable wind becoming south 5 to 9 mph in the evening.
Sunday
A 20 percent chance of snow before 11am. Partly sunny, with a high near 48. South wind 6 to 8 mph becoming northwest in the afternoon.
Sunday Night
Mostly cloudy, with a low around 34. North northeast wind around 6 mph.
Monday
Partly sunny, with a high near 48.
Monday Night
A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 40.
Tuesday
Rain. Cloudy, with a high near 50.
Tuesday Night
Rain. Mostly cloudy, with a low around 39.
Wednesday
Rain. Mostly cloudy, with a high near 48.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 36.
Thursday
A chance of rain. Partly sunny, with a high near 49.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 34.
Friday
A slight chance of rain. Partly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Newcastle WA
 47.53°N 122.11°W (Elev. 1237 ft)
Last Update:
11:27 pm PDT Mar 20, 2026
Forecast Valid:
1am PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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