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

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

45°F

7°C

Humidity 52%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 17 Mar 11:15 PM MDT
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. South wind around 8 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 62. South southeast wind 8 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 62 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 40. South wind 6 to 9 mph.

    Low: 40 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 65. South southeast wind 7 to 11 mph becoming southwest in the afternoon.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. Southwest wind 6 to 10 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. South wind 7 to 10 mph.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Partly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 39. South wind around 8 mph.
Wednesday
Sunny, with a high near 62. South southeast wind 8 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 40. South wind 6 to 9 mph.
Thursday
Sunny, with a high near 65. South southeast wind 7 to 11 mph becoming southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 41. Southwest wind 6 to 10 mph.
Friday
Mostly sunny, with a high near 66. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 43. South wind 7 to 10 mph.
Saturday
A 20 percent chance of showers after noon. Partly sunny, with a high near 66.
Saturday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 57.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
A chance of rain and snow showers. Mostly cloudy, with a high near 58. Breezy.
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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:
11:33 pm MDT Mar 17, 2026
Forecast Valid:
11pm MDT Mar 17, 2026-6pm MDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation