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

52°F

11°C

Humidity 81%
Wind Speed N 0 MPH
Barometer 29.69 in (1005.42 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 21 Apr 01:00 AM PDT
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 50. Southwest wind around 5 mph.

    Low: 50 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 77. Southwest wind 5 to 11 mph, with gusts as high as 18 mph.

    High: 77 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then rain likely after 8pm. Cloudy, with a low around 48. West wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Chance
    Showers then
    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 63. West wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 63 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42. West wind 9 to 18 mph, with gusts as high as 28 mph.

    Low: 42 °F

    Partly Cloudy

  • Thursday

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

    High: 66 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 50. Southwest wind around 5 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 77. Southwest wind 5 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
A chance of showers and thunderstorms, then rain likely after 8pm. Cloudy, with a low around 48. West wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 63. West wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Partly cloudy, with a low around 42. West wind 9 to 18 mph, with gusts as high as 28 mph.
Thursday
A 20 percent chance of rain before 11am. Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 40.
Saturday
Sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
11:46 pm PDT Apr 20, 2026
Forecast Valid:
1am PDT Apr 21, 2026-6pm PDT Apr 27, 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