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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

37°F

3°C

Humidity 64%
Wind Speed N 1 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Last update 17 Oct 06:15 AM MDT
Extended Forecast for

Mammoth WY

  • Today

    Today: Mostly sunny, with a high near 60. Southeast wind 8 to 11 mph, with gusts as high as 24 mph.

    High: 60 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 34. South southeast wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 61. Southeast wind 5 to 8 mph becoming light and variable.

    High: 61 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33. South southeast wind 6 to 9 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61. South southwest wind 5 to 9 mph.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. South wind 5 to 9 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 59. South southeast wind around 6 mph becoming calm.

    High: 59 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 60. Southeast wind 8 to 11 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 34. South southeast wind 8 to 11 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 61. Southeast wind 5 to 8 mph becoming light and variable.
Sunday Night
Mostly clear, with a low around 33. South southeast wind 6 to 9 mph.
Monday
Sunny, with a high near 61. South southwest wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 36. South wind 5 to 9 mph.
Tuesday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 59. South southeast wind around 6 mph becoming calm.
Tuesday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
A chance of showers. Mostly sunny, with a high near 58.
Thursday Night
Showers likely. Mostly cloudy, with a low around 37.
Friday
Rain and snow showers. Mostly cloudy, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 45°N 110.69°W (Elev. 5745 ft)
Last Update:
7:02 am MDT Oct 17, 2026
Forecast Valid:
7am MDT Oct 17, 2026-6pm MDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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