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

Sunnyside Municipal Airport (K1S5)

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

Clear

89°F

32°C

Humidity 30%
Wind Speed N 0 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Aug 03:35 PM PDT
Extended Forecast for

16 Miles S Royal City WA

  • Tonight

    Tonight: Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 63. South wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny and hot, with a high near 100. Calm wind becoming north around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 67. Northwest wind around 6 mph.

    Low: 67 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 11am. Mostly sunny, with a high near 96.

    High: 96 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Sunday Night

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

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 99. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Increasing clouds, with a low around 63. South wind around 5 mph becoming calm in the evening.
Friday
Partly sunny and hot, with a high near 100. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
A 20 percent chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 67. Northwest wind around 6 mph.
Saturday
A 20 percent chance of showers and thunderstorms before 11am. Mostly sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 88.
Sunday Night
Mostly clear, with a low around 55.
Monday
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
16 Miles S Royal City WA
 46.66°N 119.56°W (Elev. 453 ft)
Last Update:
3:00 pm PDT Aug 19, 2026
Forecast Valid:
3pm PDT Aug 19, 2026-6pm PDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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