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

68°F

20°C

Humidity 16%
Wind Speed SW 9 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Last update 21 Apr 01:15 PM MDT
Extended Forecast for

Mammoth WY

Winter Weather Advisory April 22, 12:00pm until April 23, 11:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 70. South wind 11 to 14 mph, with gusts as high as 20 mph.

    High: 70 °F

    Mostly Cloudy

  • Tonight

    Tonight: Isolated showers between midnight and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 42. South southeast wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 42 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 53. Breezy, with a southeast wind 8 to 13 mph becoming south southwest 15 to 20 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 70%.

    High: 53 °F

    Breezy.
    Scattered
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow showers, becoming all snow after 3am. Some thunder is also possible. Snow level 6900 feet lowering to 5700 feet after midnight . Low around 35. Breezy, with a southwest wind 9 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 35 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Snow showers. Some thunder is also possible. High near 46. West wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 46 °F

    Snow Showers

  • Thursday Night

    Thursday Night: Snow showers. Some thunder is also possible. Low around 24. North northwest wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    Low: 24 °F

    Snow Showers

  • Friday

    Friday: Snow showers. Some thunder is also possible. High near 38. North northwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 38 °F

    Snow Showers

  • Friday Night

    Friday Night: A 40 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: A 30 percent chance of snow showers, mainly after noon. Mostly sunny, with a high near 44.

    High: 44 °F

    Chance Snow
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 70. South wind 11 to 14 mph, with gusts as high as 20 mph.
Tonight
Isolated showers between midnight and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 42. South southeast wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 53. Breezy, with a southeast wind 8 to 13 mph becoming south southwest 15 to 20 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 70%.
Wednesday Night
Rain and snow showers, becoming all snow after 3am. Some thunder is also possible. Snow level 6900 feet lowering to 5700 feet after midnight . Low around 35. Breezy, with a southwest wind 9 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers. Some thunder is also possible. High near 46. West wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers. Some thunder is also possible. Low around 24. North northwest wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Friday
Snow showers. Some thunder is also possible. High near 38. North northwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 20.
Saturday
A 30 percent chance of snow showers, mainly after noon. Mostly sunny, with a high near 44.
Saturday Night
A 30 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 24.
Sunday
A chance of snow showers. Partly sunny, with a high near 48.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 28.
Monday
A chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 50.
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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:
2:10 pm MDT Apr 21, 2026
Forecast Valid:
2pm MDT Apr 21, 2026-6pm MDT Apr 27, 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