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

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

  • Today

    Today: Mostly sunny, with a high near 58. North wind around 7 mph becoming south in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. Southwest wind 6 to 10 mph becoming north after midnight.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 61. Northeast wind around 10 mph, with gusts as high as 18 mph.

    High: 61 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Northeast wind 8 to 10 mph becoming northwest in the evening. Winds could gust as high as 18 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 64. Northwest wind 7 to 9 mph.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A 40 percent chance of rain. Mostly cloudy, with a high near 58.

    High: 58 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

  • Sunday

    Sunday: A 20 percent chance of rain. Partly sunny, with a high near 55.

    High: 55 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 58. North wind around 7 mph becoming south in the afternoon.
Tonight
Mostly clear, with a low around 41. Southwest wind 6 to 10 mph becoming north after midnight.
Thursday
Sunny, with a high near 61. Northeast wind around 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 44. Northeast wind 8 to 10 mph becoming northwest in the evening. Winds could gust as high as 18 mph.
Friday
Mostly sunny, with a high near 64. Northwest wind 7 to 9 mph.
Friday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 49.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 58.
Saturday Night
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 43.
Sunday
A 20 percent chance of rain. Partly sunny, with a high near 55.
Sunday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 56.
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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:
3:22 am PDT Apr 8, 2026
Forecast Valid:
9am PDT Apr 8, 2026-6pm PDT Apr 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation