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 low around 49. Light and variable wind.

    Low: 49 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain before 8am, then a slight chance of rain after 11am. Partly sunny, with a high near 69. Calm wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 40%.

    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 7 mph becoming calm in the evening.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 11am. Mostly cloudy, with a high near 66. Calm wind becoming south around 6 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 44. Southwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance Rain

  • Monday

    Monday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 65.

    High: 65 °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 59.

    High: 59 °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 low around 49. Light and variable wind.
Saturday
A chance of rain before 8am, then a slight chance of rain after 11am. Partly sunny, with a high near 69. Calm wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 44. West wind 5 to 7 mph becoming calm in the evening.
Sunday
A 30 percent chance of rain after 11am. Mostly cloudy, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 44. Southwest wind around 7 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 65.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 59.
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 58.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 62.
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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:
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

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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