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

54°F

12°C

Humidity 47%
Wind Speed N 0 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 01 Mar 04:55 PM PST
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Light and variable wind.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 59. South wind 3 to 6 mph.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. South wind around 6 mph becoming light and variable  in the evening.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. Light southwest wind increasing to 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. South wind around 9 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    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 20 percent chance of rain before 10pm.  Partly cloudy, with a low around 39.

    Low: 39 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Thursday

    Thursday: A 10 percent chance of rain after 4pm.  Partly sunny, with a high near 55.

    High: 55 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before 10pm.  Partly cloudy, with a low around 37.

    Low: 37 °F

    Slight Chance
    Rain then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. Light and variable wind.
Monday
Sunny, with a high near 59. South wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 37. South wind around 6 mph becoming light and variable in the evening.
Tuesday
Mostly cloudy, with a high near 60. Light southwest wind increasing to 6 to 11 mph in the morning.
Tuesday Night
Rain likely, mainly after 4am. Cloudy, with a low around 43. South wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 39.
Thursday
A 10 percent chance of rain after 4pm. Partly sunny, with a high near 55.
Thursday Night
A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 37.
Friday
Partly sunny, with a high near 58.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Saturday
A slight chance of rain. Mostly cloudy, with a high near 62.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Sunday
A slight chance of rain. Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
3:42 pm PST Mar 1, 2026
5pm PST Mar 1, 2026-6pm PDT Mar 8, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database