Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

88°F

31°C

Humidity 41%
Wind Speed N 0 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 21 Aug 01:15 PM PDT
Extended Forecast for

Zillah WA

Heat Advisory August 21, 01:23pm until August 21, 10:00pm
Red Flag Warning August 22, 12:00pm until August 22, 10:00pm
Click here for hazard details and duration
Heat Advisory
Red Flag Warning
  •  
    Heat Advisory August 21, 01:23pm until August 21, 10:00pm

    NOW until 10:00pm Fri

    Heat Advisory

  • This Afternoon

    High: 97 °F

    Mostly Cloudy

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 68. Light northwest wind.

    Low: 68 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 95. Light west wind increasing to 12 to 17 mph in the morning. Winds could gust as high as 29 mph.

    High: 95 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. West wind 6 to 15 mph, with gusts as high as 31 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 87. West wind around 5 mph becoming calm  in the morning.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 97. Light south wind.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 68. Light northwest wind.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 95. Light west wind increasing to 12 to 17 mph in the morning. Winds could gust as high as 29 mph.
Saturday Night
Mostly clear, with a low around 56. West wind 6 to 15 mph, with gusts as high as 31 mph.
Sunday
Sunny, with a high near 87. West wind around 5 mph becoming calm in the morning.
Sunday Night
Mostly clear, with a low around 55.
Monday
Sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Zillah WA
 46.4°N 120.27°W (Elev. 797 ft)
1:11 pm PDT Aug 21, 2026
1pm PDT Aug 21, 2026-6pm PDT Aug 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database