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

MAMMOTH AT YELLOWSTONE NP (YLAW4)

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

NA

78°F

26°C

Humidity 22%
Wind Speed ENE 4 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Heat Index78°F (26°C)
Last update 13 Jul 11:15 AM MDT
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. North wind 5 to 9 mph becoming west northwest.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 56. Northwest wind 5 to 9 mph becoming light and variable after midnight.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 89. Calm wind becoming west southwest 5 to 9 mph in the morning.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Partly cloudy, with a low around 53. West wind 6 to 8 mph becoming north northeast after midnight. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 74. North wind 6 to 9 mph. Chance of precipitation is 70%.

    High: 74 °F

    Chance
    Showers then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 47. North northeast wind 6 to 8 mph.

    Low: 47 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 79. North wind 5 to 8 mph becoming west northwest in the afternoon.

    High: 79 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 10 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 48.

    Low: 48 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 84.

    High: 84 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 87. North wind 5 to 9 mph becoming west northwest.
Tonight
Partly cloudy, with a low around 56. Northwest wind 5 to 9 mph becoming light and variable after midnight.
Monday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 89. Calm wind becoming west southwest 5 to 9 mph in the morning.
Monday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Partly cloudy, with a low around 53. West wind 6 to 8 mph becoming north northeast after midnight. Chance of precipitation is 40%.
Tuesday
A chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 74. North wind 6 to 9 mph. Chance of precipitation is 70%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 47. North northeast wind 6 to 8 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 79. North wind 5 to 8 mph becoming west northwest in the afternoon.
Wednesday Night
A 10 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 48.
Thursday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 84.
Thursday Night
A 10 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 51.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 88.
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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:
10:57 am MDT Jul 13, 2025
Forecast Valid:
12pm MDT Jul 13, 2025-6pm MDT Jul 19, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation