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.

Partly Cloudy

43°F

6°C

Humidity 93%
Wind Speed NNW 5 MPH
Barometer 29.63 in (1003.39 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 12 Apr 06:20 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 66. Light and variable wind becoming southwest 5 to 7 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Chance Rain

  • Tonight

    Tonight: A 50 percent chance of rain, mainly before 2am. Mostly cloudy, with a low around 45. West wind around 9 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Chance Rain

  • Monday

    Monday: Mostly sunny, with a high near 67. West wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. West wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60. Southwest wind 9 to 18 mph, with gusts as high as 26 mph.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

  • Wednesday

    Wednesday: A 40 percent chance of rain, mainly before 11am. Partly sunny, with a high near 56.

    High: 56 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm. Snow level 2500 feet lowering to 1300 feet after midnight . Mostly cloudy, with a low around 32.

    Low: 32 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

Today
A 50 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 66. Light and variable wind becoming southwest 5 to 7 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A 50 percent chance of rain, mainly before 2am. Mostly cloudy, with a low around 45. West wind around 9 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Mostly sunny, with a high near 67. West wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 39. West wind 9 to 15 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 60. Southwest wind 9 to 18 mph, with gusts as high as 26 mph.
Tuesday Night
A 50 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 41.
Wednesday
A 40 percent chance of rain, mainly before 11am. Partly sunny, with a high near 56.
Wednesday Night
A 20 percent chance of rain before 11pm. Snow level 2500 feet lowering to 1300 feet after midnight . Mostly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 66.
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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:
4:01 am PDT Apr 12, 2026
Forecast Valid:
6am PDT Apr 12, 2026-6pm PDT Apr 18, 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