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

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

59°F

15°C

Humidity 54%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 25 Aug 02:15 AM MDT
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. South southeast wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 81. South southeast wind around 5 mph becoming calm. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 51. Light and variable wind becoming south southeast around 5 mph after midnight. Chance of precipitation is 30%.

    Low: 51 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 10 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 52. Light and variable wind becoming south southeast around 6 mph after midnight.

    Low: 52 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84. Light and variable wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 84 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South wind 7 to 9 mph.

    Low: 52 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. South southeast wind around 5 mph.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 81. South southeast wind around 5 mph becoming calm. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 51. Light and variable wind becoming south southeast around 5 mph after midnight. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. Calm wind becoming west northwest around 6 mph in the afternoon.
Wednesday Night
A 10 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 52. Light and variable wind becoming south southeast around 6 mph after midnight.
Thursday
A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84. Light and variable wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South wind 7 to 9 mph.
Friday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 79.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Saturday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 74. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 72.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 75.
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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:
2:47 am MDT Aug 25, 2026
Forecast Valid:
3am MDT Aug 25, 2026-6pm MDT Aug 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation