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

61°F

16°C

Humidity 51%
Wind Speed NNW 6 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 18 Apr 07:20 PM PDT
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: Partly cloudy, with a low around 41. Northeast wind around 6 mph becoming west after midnight.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 75. West wind 6 to 8 mph becoming northeast in the afternoon.

    High: 75 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 48. Northeast wind 6 to 8 mph becoming northwest after midnight.

    Low: 48 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 80. Northwest wind around 6 mph becoming light and variable.

    High: 80 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51. Northeast wind around 6 mph becoming west after midnight.

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Rain likely, mainly after 11pm. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

    Low: 49 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 41. Northeast wind around 6 mph becoming west after midnight.
Sunday
Partly sunny, with a high near 75. West wind 6 to 8 mph becoming northeast in the afternoon.
Sunday Night
Mostly cloudy, with a low around 48. Northeast wind 6 to 8 mph becoming northwest after midnight.
Monday
Partly sunny, with a high near 80. Northwest wind around 6 mph becoming light and variable.
Monday Night
Partly cloudy, with a low around 51. Northeast wind around 6 mph becoming west after midnight.
Tuesday
Partly sunny, with a high near 78.
Tuesday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Wednesday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 43.
Thursday
A chance of rain, mainly before 11am. Mostly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
2:57 pm PDT Apr 18, 2026
Forecast Valid:
7pm PDT Apr 18, 2026-6pm PDT Apr 25, 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