Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

1°F

-17°C

Humidity 75%
Wind Speed WSW 1 MPH
Barometer NA
Dewpoint -6°F (-21°C)
Visibility NA
Last update 28 Dec 04:15 AM MST
Extended Forecast for

Mammoth WY

  • Today

    Today: Sunny, with a high near 22. Wind chill values as low as -5. South southwest wind around 5 mph becoming calm  in the morning.

    High: 22 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 7. Wind chill values as low as -5. South southwest wind around 6 mph.

    Low: 7 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 32. Wind chill values as low as -5. South southeast wind 3 to 6 mph.

    High: 32 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16. South wind around 6 mph.

    Low: 16 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. South wind around 5 mph becoming calm.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 18. South wind around 7 mph.

    Low: 18 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 40. South wind around 6 mph.

    High: 40 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 22. Wind chill values as low as -5. South southwest wind around 5 mph becoming calm in the morning.
Tonight
Mostly clear, with a low around 7. Wind chill values as low as -5. South southwest wind around 6 mph.
Monday
Sunny, with a high near 32. Wind chill values as low as -5. South southeast wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 16. South wind around 6 mph.
Tuesday
Mostly sunny, with a high near 38. South wind around 5 mph becoming calm.
Tuesday Night
Partly cloudy, with a low around 18. South wind around 7 mph.
Wednesday
Sunny, with a high near 40. South wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 21.
New Year's Day
Partly sunny, with a high near 42.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
A slight chance of snow. Partly sunny, with a high near 41.
Friday Night
A chance of snow. Mostly cloudy, with a low around 24.
Saturday
A chance of snow. Partly sunny, with a high near 36.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
5:01 am MST Dec 28, 2025
5am MST Dec 28, 2025-6pm MST Jan 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

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