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Above Average Temperatures in the West; Winter Weather Returns to the Upper Midwest and Great Lakes

Well above average temperatures will continue across the West this week, potentially breaking some daily high temperature records. A storm system dropping south out of Canada will bring a wintry mix to the Upper Midwest and Great Lakes Tuesday, pushing into the Central Appalachians and interior Northeast on Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

42°F

6°C

Humidity 81%
Wind Speed N 0 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 12 Jan 09:35 PM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 13, 07:00am until January 16, 07:00am
Click here for hazard details and duration
Air Stagnation Advisory

  • Tonight

    Tonight: Patchy dense fog after 4am. Otherwise, partly cloudy, with a low around 37. Southwest wind 3 to 5 mph.

    Low: 37 °F

    Partly Cloudy
    then Patchy
    Dense Fog

  • Tuesday

    Tuesday: Patchy dense fog before 10am. Otherwise, mostly cloudy, with a high near 51. Calm wind.

    High: 51 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Patchy dense fog. Otherwise, partly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Partly sunny, with a high near 47. Calm wind.

    High: 47 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Patchy dense fog before 10pm. Otherwise, mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Patchy dense fog before 10pm. Otherwise, partly cloudy, with a low around 29.

    Low: 29 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy dense fog between 10pm and 4am. Otherwise, mostly cloudy, with a low around 28.

    Low: 28 °F

    Patchy Dense
    Fog

Detailed Forecast

Tonight
Patchy dense fog after 4am. Otherwise, partly cloudy, with a low around 37. Southwest wind 3 to 5 mph.
Tuesday
Patchy dense fog before 10am. Otherwise, mostly cloudy, with a high near 51. Calm wind.
Tuesday Night
Patchy dense fog. Otherwise, partly cloudy, with a low around 34. Calm wind.
Wednesday
Partly sunny, with a high near 47. Calm wind.
Wednesday Night
Patchy dense fog before 10pm. Otherwise, mostly cloudy, with a low around 31. Calm wind.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Patchy dense fog before 10pm. Otherwise, partly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 43.
Friday Night
Patchy dense fog between 10pm and 4am. Otherwise, mostly cloudy, with a low around 28.
Saturday
Patchy dense fog between 7am and 10am. Otherwise, partly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 26.
M.L.King Day
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
9:17 pm PST Jan 12, 2026
Forecast Valid:
9pm PST Jan 12, 2026-6pm PST Jan 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