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

52°F

11°C

Humidity 87%
Wind Speed E 4 MPH
Barometer 29.64 in (1003.73 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 11 Apr 06:35 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: A chance of rain before 8am, then a slight chance of rain after 11am. Partly sunny, with a high near 69. South wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 40%.

    High: 69 °F

    Chance Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 9 mph becoming light and variable after midnight.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of rain after 11am. Mostly cloudy, with a high near 65. South wind 3 to 7 mph.

    High: 65 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 45. Southwest wind around 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Chance Rain

  • Monday

    Monday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 65. West wind 9 to 14 mph, with gusts as high as 22 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 50 percent chance of rain. Partly sunny, with a high near 57.

    High: 57 °F

    Chance Rain

Detailed Forecast

Today
A chance of rain before 8am, then a slight chance of rain after 11am. Partly sunny, with a high near 69. South wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 40%.
Tonight
A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 9 mph becoming light and variable after midnight.
Sunday
A 40 percent chance of rain after 11am. Mostly cloudy, with a high near 65. South wind 3 to 7 mph.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 45. Southwest wind around 9 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 9 to 14 mph, with gusts as high as 22 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 50 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 59.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
4:01 am PDT Apr 11, 2026
Forecast Valid:
6am 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