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.

Clear

50°F

10°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 29.69 in (1005.42 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 21 Apr 07:20 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: A 30 percent chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 77. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 77 °F

    Partly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms, then rain likely after 8pm. Cloudy, with a low around 48. West wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Chance
    Showers then
    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 64. West wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41. West wind 7 to 16 mph, with gusts as high as 28 mph.

    Low: 41 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 66. Northwest wind around 7 mph.

    High: 66 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 77. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Tonight
A chance of showers and thunderstorms, then rain likely after 8pm. Cloudy, with a low around 48. West wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 64. West wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Partly cloudy, with a low around 41. West wind 7 to 16 mph, with gusts as high as 28 mph.
Thursday
Mostly sunny, with a high near 66. Northwest wind around 7 mph.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 40.
Saturday
Sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 70.
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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:
4:00 am PDT Apr 21, 2026
Forecast Valid:
7am PDT Apr 21, 2026-6pm PDT Apr 27, 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