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

77°F

25°C

Humidity 18%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 21 May 04:53 PM PDT
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: Mostly clear, with a low around 48. Northeast wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51. Southeast wind around 5 mph becoming light and variable in the evening.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 86. West wind 5 to 7 mph.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51. West wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 48. Northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 51. Southeast wind around 5 mph becoming light and variable in the evening.
Saturday
Sunny, with a high near 86. West wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 51. West wind 7 to 9 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 51.
Memorial Day
Partly sunny, with a high near 73.
Monday Night
A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 69.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 44.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 73.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 45.
Thursday
Sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
3:01 pm PDT May 21, 2026
Forecast Valid:
5pm PDT May 21, 2026-6pm PDT May 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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