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

48°F

9°C

Humidity 65%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 13 Apr 11:53 PM PDT
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: Partly cloudy, with a low around 38. Southwest wind around 9 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 2pm. Partly sunny, with a high near 58. Southwest wind 8 to 17 mph, with gusts as high as 28 mph.

    High: 58 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain, mainly after 2am. Cloudy, with a low around 43. Southwest wind 14 to 17 mph, with gusts as high as 28 mph.

    Low: 43 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 57. West wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Rain Likely
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm. Snow level 2400 feet lowering to 1300 feet after midnight . Mostly cloudy, with a low around 32. West wind 9 to 16 mph, with gusts as high as 24 mph.

    Low: 32 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 38. Southwest wind around 9 mph.
Tuesday
A 20 percent chance of rain after 2pm. Partly sunny, with a high near 58. Southwest wind 8 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
A 40 percent chance of rain, mainly after 2am. Cloudy, with a low around 43. Southwest wind 14 to 17 mph, with gusts as high as 28 mph.
Wednesday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 57. West wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 20 percent chance of rain before 11pm. Snow level 2400 feet lowering to 1300 feet after midnight . Mostly cloudy, with a low around 32. West wind 9 to 16 mph, with gusts as high as 24 mph.
Thursday
Mostly sunny, with a high near 59.
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
Partly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
A chance of rain. Mostly cloudy, with a high near 68.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 43.
Monday
A chance of rain. Partly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
11:46 pm PDT Apr 13, 2026
Forecast Valid:
12am PDT Apr 14, 2026-6pm PDT Apr 20, 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