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

Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Periods of critical fire weather will persist from the central Rockies to the central Plains through the weekend as gusty winds and low relative humidity continue. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Clear

N/A

Humidity 87%
Wind Speed N 0 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 10 Mar 07:35 AM PDT
Extended Forecast for

11 Miles SSW Mattawa WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 51. Southwest wind around 20 mph, with gusts as high as 29 mph.

    Low: 51 °F

    Mostly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 63. Breezy, with a southwest wind 20 to 28 mph, with gusts as high as 41 mph.

    High: 63 °F

    Increasing
    Clouds and
    Breezy

  • Friday Night

    Friday Night: Cloudy, with a low around 41. Breezy, with a west wind 16 to 24 mph, with gusts as high as 37 mph.

    Low: 41 °F

    Cloudy and
    Breezy then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 50. West wind 16 to 18 mph, with gusts as high as 28 mph.

    High: 50 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. Northwest wind 14 to 18 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 51. Southwest wind around 20 mph, with gusts as high as 29 mph.
Friday
Increasing clouds, with a high near 63. Breezy, with a southwest wind 20 to 28 mph, with gusts as high as 41 mph.
Friday Night
Cloudy, with a low around 41. Breezy, with a west wind 16 to 24 mph, with gusts as high as 37 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 50. West wind 16 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 31. Northwest wind 14 to 18 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Mostly cloudy, with a low around 35.
Monday
Mostly cloudy, with a high near 50.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
A chance of rain. Mostly cloudy, with a high near 53.
Tuesday Night
A chance of rain and snow. Partly cloudy, with a low around 38. Breezy.
Wednesday
Mostly sunny, with a high near 48. Breezy.
Wednesday Night
Mostly clear, with a low around 32. Breezy.
Thursday
Sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
Last Update:
3:31 am PDT Mar 20, 2026
Forecast Valid:
3am PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
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Additional Resources

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