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 66%
Wind Speed SW 3 MPH
Barometer 29.73 in (1006.77 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 13 Apr 02:00 AM PDT
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 44. West wind around 8 mph.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 65. West wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 65 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37. Southwest wind 6 to 11 mph, with gusts as high as 22 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 58. Southwest wind 7 to 16 mph, with gusts as high as 25 mph.

    High: 58 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 42. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    Low: 42 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm. Snow level 2500 feet lowering to 1400 feet after midnight . Mostly cloudy, with a low around 32.

    Low: 32 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 44. West wind around 8 mph.
Monday
Mostly sunny, with a high near 65. West wind 8 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly cloudy, with a low around 37. Southwest wind 6 to 11 mph, with gusts as high as 22 mph.
Tuesday
Increasing clouds, with a high near 58. Southwest wind 7 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 42. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.
Wednesday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of rain before 11pm. Snow level 2500 feet lowering to 1400 feet after midnight . Mostly cloudy, with a low around 32.
Thursday
Sunny, with a high near 59.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 37.
Saturday
Partly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
A slight chance of rain. Partly sunny, with a high near 67.
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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 12, 2026
Forecast Valid:
2am PDT Apr 13, 2026-6pm PDT Apr 19, 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