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

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

83°F

28°C

Humidity 13%
Wind Speed N 12 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Heat Index80°F (27°C)
Last update 02 Sep 02:15 PM MDT
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. North northwest wind around 10 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Patchy smoke between 1am and 2am. Mostly clear, with a low around 51. North northwest wind 5 to 9 mph becoming south southeast after midnight.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Smoke

  • Wednesday

    Wednesday: Patchy smoke between 11am and 1pm. Sunny, with a high near 82. South southeast wind 5 to 10 mph becoming north northwest in the afternoon.

    High: 82 °F

    Patchy Smoke

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. North northwest wind 5 to 9 mph becoming light and variable.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79. South wind 5 to 11 mph becoming north in the afternoon.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45. North wind 5 to 10 mph becoming light northeast after midnight.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 77. Light and variable wind becoming north northwest 5 to 9 mph in the afternoon.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.

    High: 79 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 84. North northwest wind around 10 mph.
Tonight
Patchy smoke between 1am and 2am. Mostly clear, with a low around 51. North northwest wind 5 to 9 mph becoming south southeast after midnight.
Wednesday
Patchy smoke between 11am and 1pm. Sunny, with a high near 82. South southeast wind 5 to 10 mph becoming north northwest in the afternoon.
Wednesday Night
Mostly clear, with a low around 52. North northwest wind 5 to 9 mph becoming light and variable.
Thursday
Sunny, with a high near 79. South wind 5 to 11 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 45. North wind 5 to 10 mph becoming light northeast after midnight.
Friday
Sunny, with a high near 77. Light and variable wind becoming north northwest 5 to 9 mph in the afternoon.
Friday Night
Mostly clear, with a low around 46.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 71.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
3:15 pm MDT Sep 2, 2025
Forecast Valid:
3pm MDT Sep 2, 2025-6pm MDT Sep 8, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation