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

62°F

17°C

Humidity 18%
Wind Speed SW 16 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Last update 18 Mar 04:15 PM MDT
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 64. Southwest wind around 14 mph, with gusts as high as 21 mph.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. Southwest wind 5 to 13 mph.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 65. South southeast wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. South southwest wind 5 to 11 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 67. Southwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46. South wind 7 to 10 mph.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers. Mostly sunny, with a high near 61. Breezy, with a south wind 8 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 61 °F

    Slight Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 64. Southwest wind around 14 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 39. Southwest wind 5 to 13 mph.
Thursday
Sunny, with a high near 65. South southeast wind 7 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 41. South southwest wind 5 to 11 mph.
Friday
Sunny, with a high near 67. Southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 46. South wind 7 to 10 mph.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 61. Breezy, with a south wind 8 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 34.
Monday
Partly sunny, with a high near 56.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 37.
Tuesday
A slight chance of showers. Partly sunny, with a high near 59. 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:
4:01 pm MDT Mar 18, 2026
Forecast Valid:
4pm MDT Mar 18, 2026-6pm MDT Mar 24, 2026
 
Forecast Discussion
 
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