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

Tri-Cities Airport (KPSC)

Lat: 46.26955°NLon: 119.11813°WElev: 397.0ft.

Overcast

63°F

17°C

Humidity 55%
Wind Speed SW 18 MPH
Barometer 29.67 in (1004.74 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 11 Apr 10:30 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: A 20 percent chance of rain after 11am. Partly sunny, with a high near 69. Southwest wind 5 to 9 mph.

    High: 69 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 7 mph becoming calm in the evening.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 11am. Mostly cloudy, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.

    High: 66 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 44. Southwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance Rain

  • Monday

    Monday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 65. West wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 65 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

  • Wednesday

    Wednesday: A 40 percent chance of rain. Partly sunny, with a high near 57.

    High: 57 °F

    Chance Rain

Detailed Forecast

Today
A 20 percent chance of rain after 11am. Partly sunny, with a high near 69. Southwest wind 5 to 9 mph.
Tonight
A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 7 mph becoming calm in the evening.
Sunday
A 30 percent chance of rain after 11am. Mostly cloudy, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 44. Southwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 20 percent chance of rain before 11am. Partly sunny, with a high near 65. West wind 7 to 14 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 57.
Wednesday Night
A slight chance of rain before 11pm. Snow level 2800 feet lowering to 1500 feet after midnight . Partly cloudy, with a low around 32.
Thursday
Sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
4:01 am PDT Apr 11, 2026
Forecast Valid:
10am PDT Apr 11, 2026-6pm PDT Apr 17, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation