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

55°F

13°C

Humidity 43%
Wind Speed SW 14 MPH
Barometer 29.73 in (1006.77 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 15 Apr 04:00 AM PDT
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: A 40 percent chance of rain. Cloudy, with a steady temperature around 46. Southwest wind around 15 mph, with gusts as high as 26 mph.

    Low: 46 °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

Overnight
A 40 percent chance of rain. Cloudy, with a steady temperature around 46. Southwest wind around 15 mph, with gusts as high as 26 mph.
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
Mostly sunny, with a high near 77.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 78.
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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:
4:00 am PDT Apr 15, 2026
Forecast Valid:
4am PDT Apr 15, 2026-6pm PDT Apr 21, 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