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

64°F

18°C

Humidity 52%
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 11:20 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: Mostly sunny, with a high near 69. West wind around 10 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. West wind 5 to 8 mph becoming light and variable after midnight.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 64. Light and variable wind becoming south 5 to 7 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 46. West wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Rain Likely

  • Monday

    Monday: A 20 percent chance of rain before 11am. Mostly sunny, with a high near 66. West wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 66 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

  • Wednesday

    Wednesday: A 40 percent chance of rain. Partly sunny, with a high near 56.

    High: 56 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 69. West wind around 10 mph.
Tonight
Mostly cloudy, with a low around 45. West wind 5 to 8 mph becoming light and variable after midnight.
Sunday
A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 64. Light and variable wind becoming south 5 to 7 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 46. West wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 20 percent chance of rain before 11am. Mostly sunny, with a high near 66. West wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 56.
Wednesday Night
A slight chance of rain before 11pm. Snow level 2700 feet lowering to 1400 feet after midnight . Mostly cloudy, with a low around 32.
Thursday
Mostly 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
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
11:32 am PDT Apr 11, 2026
Forecast Valid:
11am 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