National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Late January Extreme Cold; Watching for Another East Coast Storm Threat This Weekend

Well below normal temperatures will continue for the eastern half of the Lower 48 this week. Another blast of arctic air will spread from the Plains through the East/Southeast Friday into Saturday with more record lows expected even into Florida. Forecasts are being monitored for increasing potential of another significant winter storm to impact the eastern United States this coming weekend. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

18°F

-8°C

Humidity 67%
Wind Speed WSW 4 MPH
Barometer NA
Dewpoint 9°F (-13°C)
Visibility NA
Wind Chill12°F (-11°C)
Last update 27 Jan 07:15 AM MST
Extended Forecast for

Mammoth WY

  • Today

    Today: Sunny, with a high near 32. South southeast wind around 6 mph.

    High: 32 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 17. Southeast wind 6 to 8 mph.

    Low: 17 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 35. Southeast wind 5 to 7 mph becoming southwest in the afternoon.

    High: 35 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. Southwest wind around 6 mph.

    Low: 19 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 34. South southwest wind around 6 mph.

    High: 34 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22. South southwest wind around 6 mph.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 37. South wind around 7 mph.

    High: 37 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 32. South southeast wind around 6 mph.
Tonight
Partly cloudy, with a low around 17. Southeast wind 6 to 8 mph.
Wednesday
Partly sunny, with a high near 35. Southeast wind 5 to 7 mph becoming southwest in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 19. Southwest wind around 6 mph.
Thursday
Partly sunny, with a high near 34. South southwest wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around 22. South southwest wind around 6 mph.
Friday
Mostly cloudy, with a high near 37. South wind around 7 mph.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 25.
Monday
A slight chance of snow showers. Mostly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
5:46 am MST Jan 27, 2026
Forecast Valid:
7am MST Jan 27, 2026-6pm MST Feb 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation