Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

64°F

18°C

Humidity 91%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 15 Aug 03:35 AM PDT
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms.  Patchy smoke. Mostly cloudy, with a steady temperature around 62. Calm wind.

    Low: 62 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms.  Patchy smoke. Mostly sunny, with a high near 91. Light and variable wind.

    High: 91 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Patchy smoke after 11pm. Increasing clouds, with a low around 58. Light west wind.

    Low: 58 °F

    Patchy Smoke

  • Sunday

    Sunday: Patchy smoke. Cloudy through mid morning, then gradual clearing, with a high near 93. Calm wind.

    High: 93 °F

    Patchy Smoke

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59. Calm wind becoming west around 5 mph after midnight.

    Low: 59 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

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

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Patchy smoke. Mostly cloudy, with a steady temperature around 62. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms. Patchy smoke. Mostly sunny, with a high near 91. Light and variable wind.
Saturday Night
Patchy smoke after 11pm. Increasing clouds, with a low around 58. Light west wind.
Sunday
Patchy smoke. Cloudy through mid morning, then gradual clearing, with a high near 93. Calm wind.
Sunday Night
Mostly cloudy, with a low around 59. Calm wind becoming west around 5 mph after midnight.
Monday
Mostly sunny, with a high near 95.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 93.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
11:46 pm PDT Aug 14, 2026
3am PDT Aug 15, 2026-6pm PDT Aug 21, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database