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

50°F

10°C

Humidity 89%
Wind Speed N 0 MPH
Barometer 29.63 in (1003.39 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 10 Apr 11:53 PM PDT
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: A 40 percent chance of rain, mainly after 2am. Mostly cloudy, with a steady temperature around 52. West wind around 5 mph becoming light and variable.

    Low: 52 °F

    Chance Rain

  • Saturday

    Saturday: A 40 percent chance of rain, mainly between 11am and 5pm. Partly sunny, with a high near 69. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 69 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 8 mph becoming light and variable after midnight.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of rain after 11am. Mostly cloudy, with a high near 66. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 66 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 45. Southwest wind around 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Chance Rain

  • Monday

    Monday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 66.

    High: 66 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

Detailed Forecast

Overnight
A 40 percent chance of rain, mainly after 2am. Mostly cloudy, with a steady temperature around 52. West wind around 5 mph becoming light and variable.
Saturday
A 40 percent chance of rain, mainly between 11am and 5pm. Partly sunny, with a high near 69. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Saturday Night
A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 8 mph becoming light and variable after midnight.
Sunday
A 40 percent chance of rain after 11am. Mostly cloudy, with a high near 66. Calm wind becoming south 5 to 7 mph in the afternoon.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 45. Southwest wind around 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 20 percent chance of rain before 11am. Partly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Wednesday
A chance of rain. Partly sunny, with a high near 57.
Wednesday Night
A slight chance of rain. Snow level 2800 feet lowering to 1500 feet after midnight . Partly cloudy, with a low around 32.
Thursday
Sunny, with a high near 59.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 63.
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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:
11:46 pm PDT Apr 10, 2026
Forecast Valid:
12am PDT Apr 11, 2026-6pm PDT Apr 17, 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