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.

Overcast

54°F

12°C

Humidity 46%
Wind Speed SW 13 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 14 Apr 09:53 PM PDT
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: A slight chance of rain before 11pm, then a chance of rain after 2am. Cloudy, with a low around 43. Southwest wind 15 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.

    Low: 43 °F

    Chance Rain

  • Wednesday

    Wednesday: A chance of rain before 11am, then a slight chance of rain after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 57. West wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Chance Rain
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 8pm. Snow level 2300 feet lowering to 800 feet after midnight . Partly cloudy, with a low around 31. West wind 9 to 15 mph, with gusts as high as 24 mph.

    Low: 31 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 60. West wind around 9 mph.

    High: 60 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33. West wind 6 to 9 mph.

    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 38.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of rain before 11pm, then a chance of rain after 2am. Cloudy, with a low around 43. Southwest wind 15 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
Wednesday
A chance of rain before 11am, then a slight chance of rain after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 57. West wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 20 percent chance of rain before 8pm. Snow level 2300 feet lowering to 800 feet after midnight . Partly cloudy, with a low around 31. West wind 9 to 15 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 60. West wind around 9 mph.
Thursday Night
Mostly clear, with a low around 33. West wind 6 to 9 mph.
Friday
Sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
A slight chance of rain. Partly sunny, with a high near 72.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 76.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
9:48 pm PDT Apr 14, 2026
Forecast Valid:
10pm PDT Apr 14, 2026-6pm PDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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