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

Flooding Threat Along the Gulf Coast, Southern Rockies and High Plains; Cooler Weather in the Central and Eastern U.S.

Strong thunderstorms may bring excessive rainfall and flooding over parts of the northern Gulf Coast today and over parts of the southern Rockies into the High Plains today through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures across the central and eastern U.S. through the weekend. Read More >

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 41%
Wind Speed NNE 4 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 29 Aug 04:15 PM MDT
Extended Forecast for

Mammoth Hot Springs WY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 73. North northwest wind around 8 mph.

    High: 73 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 47. North northwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 75. Light and variable wind becoming north northwest 6 to 11 mph in the afternoon.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47. North northwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. North northwest wind around 6 mph becoming light and variable after midnight.

    Low: 49 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the afternoon.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 73. North northwest wind around 8 mph.
Tonight
Partly cloudy, with a low around 47. North northwest wind 5 to 10 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 75. Light and variable wind becoming north northwest 6 to 11 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 47. North northwest wind 5 to 10 mph becoming light and variable in the evening.
Sunday
Sunny, with a high near 81. Calm wind becoming west northwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 49. North northwest wind around 6 mph becoming light and variable after midnight.
Labor Day
Sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 50.
Tuesday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth Hot Springs WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
4:13 pm MDT Aug 29, 2025
Forecast Valid:
4pm MDT Aug 29, 2025-6pm MDT Sep 4, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation