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

29°F

-2°C

Humidity 66%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 19 Apr 02:15 AM MDT
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: Mostly clear, with a low around 27. South southeast wind around 7 mph.

    Low: 27 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. South southeast wind 7 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36. South southwest wind 6 to 10 mph becoming southeast after midnight.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 66. Southeast wind 6 to 9 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Southwest wind 6 to 9 mph becoming southeast after midnight. Winds could gust as high as 22 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69. Southeast wind 6 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 43. South southeast wind 7 to 10 mph, with gusts as high as 24 mph.

    Low: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 58. Breezy. Chance of precipitation is 70%.

    High: 58 °F

    Slight Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain showers before 3am, then rain and snow showers. Snow level 7600 feet lowering to 6400 feet after midnight . Low around 35. Breezy. Chance of precipitation is 80%.

    Low: 35 °F

    Showers
    Likely and
    Breezy then
    Rain/Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 27. South southeast wind around 7 mph.
Sunday
Sunny, with a high near 58. South southeast wind 7 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 36. South southwest wind 6 to 10 mph becoming southeast after midnight.
Monday
Sunny, with a high near 66. Southeast wind 6 to 9 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.
Monday Night
Mostly clear, with a low around 39. Southwest wind 6 to 9 mph becoming southeast after midnight. Winds could gust as high as 22 mph.
Tuesday
Mostly sunny, with a high near 69. Southeast wind 6 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 43. South southeast wind 7 to 10 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 58. Breezy. Chance of precipitation is 70%.
Wednesday Night
Rain showers before 3am, then rain and snow showers. Snow level 7600 feet lowering to 6400 feet after midnight . Low around 35. Breezy. Chance of precipitation is 80%.
Thursday
Rain and snow showers, becoming all snow after 9am. High near 45. Chance of precipitation is 80%.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 25.
Friday
A chance of snow showers. Mostly sunny, with a high near 44.
Friday Night
A chance of snow showers. Partly cloudy, with a low around 26.
Saturday
A slight chance of snow showers. Mostly sunny, with a high near 48.
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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:
1:17 am MDT Apr 19, 2026
Forecast Valid:
2am MDT Apr 19, 2026-6pm MDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation