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

Areas of Heavy Rainfall and Heat Early This Week

Excessive rainfall may produce locally considerable flash flooding over parts of South Texas, the western Gulf Coast, and lower Mississippi River Valley today into Thursday. Rainfall totals of 5 to 10 inches are expected. Hot temperatures may cause heat illnesses over central and northern California and the Pacific Northwest through Tuesday. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

64°F

18°C

Humidity 26%
Wind Speed WNW 5 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 15 Jun 09:15 PM MDT
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Partly cloudy, with a low around 46. West northwest wind around 5 mph becoming calm after midnight.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 84. Breezy, with a light and variable wind becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 84 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. Breezy, with a west wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 30 mph.

    Low: 50 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73. West northwest wind 7 to 13 mph, with gusts as high as 29 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 42. Northwest wind 8 to 13 mph becoming light north northwest after midnight. Winds could gust as high as 29 mph.

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46. West northwest wind around 6 mph becoming light and variable after midnight.

    Low: 46 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 46. West northwest wind around 5 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 84. Breezy, with a light and variable wind becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 50. Breezy, with a west wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 30 mph.
Wednesday
Sunny, with a high near 73. West northwest wind 7 to 13 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 42. Northwest wind 8 to 13 mph becoming light north northwest after midnight. Winds could gust as high as 29 mph.
Thursday
Sunny, with a high near 76. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 46. West northwest wind around 6 mph becoming light and variable after midnight.
Juneteenth
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 51.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 75. Chance of precipitation is 80%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 72.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 45.
Monday
A chance of showers and thunderstorms. 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:
8:48 pm MDT Jun 15, 2026
Forecast Valid:
9pm MDT Jun 15, 2026-6pm MDT Jun 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation