Winter Returns Across the Northern Tier; Record Warmth for the Southwest

A large high pressure system will usher in cold air for this first day of March across the northern Plains, Great Lakes, Northeast and mid-Atlantic. Some wintry precipitation may evolve across the mid-Mississippi Valley, Ohio Valley and mid-Atlantic through Monday. Meanwhile, record warmth will spread across the Southwest, southern Plains through early this week. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Clear

38°F

3°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 01 Mar 08:55 AM PST
Extended Forecast for

Prosser WA

  • Today

    Today: Partly sunny, with a high near 56. Light northwest wind.

    High: 56 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 60. Calm wind becoming south around 6 mph in the afternoon.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 38. South wind around 5 mph becoming light and variable  in the evening.

    Low: 38 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. Light south wind becoming southwest 6 to 11 mph in the morning.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain likely, mainly after 4am.  Cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 10am.  Mostly cloudy, with a high near 57. Chance of precipitation is 60%.

    High: 57 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 10pm.  Partly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain
    then Partly
    Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after 10am.  Partly sunny, with a high near 55.

    High: 55 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Partly sunny, with a high near 56. Light northwest wind.
Tonight
Mostly cloudy, with a low around 36. Calm wind.
Monday
Sunny, with a high near 60. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 38. South wind around 5 mph becoming light and variable in the evening.
Tuesday
Mostly cloudy, with a high near 60. Light south wind becoming southwest 6 to 11 mph in the morning.
Tuesday Night
Rain likely, mainly after 4am. Cloudy, with a low around 43. Chance of precipitation is 60%.
Wednesday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of rain before 10pm. Partly cloudy, with a low around 38.
Thursday
A 20 percent chance of rain after 10am. Partly sunny, with a high near 55.
Thursday Night
A slight chance of rain before 10pm. Partly cloudy, with a low around 38.
Friday
Mostly sunny, with a high near 58.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 39.
Saturday
A chance of rain. Mostly cloudy, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
8:46 am PST Mar 1, 2026
9am PST Mar 1, 2026-6pm PST Mar 7, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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