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

52°F

11°C

Humidity 62%
Wind Speed W 3 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 18 Apr 10:15 PM PDT
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Light and variable wind.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 75. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.

    High: 75 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 48. Northeast wind around 6 mph becoming light and variable in the evening.

    Low: 48 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 81. Light and variable wind.

    High: 81 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51. Light and variable wind becoming northwest around 5 mph 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: A chance of rain, then showers likely and possibly a thunderstorm after 11pm. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

    Low: 49 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 30 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 40. Light and variable wind.
Sunday
Partly sunny, with a high near 75. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 48. Northeast wind around 6 mph becoming light and variable in the evening.
Monday
Partly sunny, with a high near 81. Light and variable wind.
Monday Night
Partly cloudy, with a low around 51. Light and variable wind becoming northwest around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 78.
Tuesday Night
A chance of rain, then showers likely and possibly a thunderstorm 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 63. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 43.
Thursday
A slight chance of rain. Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Sunny, with a high near 68.
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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:
8:36 pm PDT Apr 18, 2026
Forecast Valid:
10pm 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