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

Significant Coastal Impacts to the Mid-Atlantic and Northeast; Tropical Storm Nolo to Impact Hawaii

A strong coastal storm will bring moderate to major coastal flooding, strong winds, heavy rainfall and high surf to the Mid-Atlantic and New England. Tropical Storm Nolo is expected to strengthen into a hurricane today as it moves north toward the Big Island of Hawaii. Heavy rainfall may produce life-threatening, catastrophic flooding and mudslides. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

69°F

21°C

Humidity 33%
Wind Speed WSW 0 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 24 Sep 01:15 PM MDT
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. South southwest wind 3 to 5 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. South wind 3 to 7 mph.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 74. Southwest wind 5 to 14 mph, with gusts as high as 28 mph.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. South wind 9 to 13 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 66. Breezy, with a southwest wind 8 to 16 mph, with gusts as high as 30 mph.

    High: 66 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 44. Southwest wind 7 to 11 mph becoming south southeast after midnight. Winds could gust as high as 24 mph.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 69. South southeast wind 5 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after noon. High near 59. Chance of precipitation is 80%.

    High: 59 °F

    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 74. South southwest wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 45. South wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 74. Southwest wind 5 to 14 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 45. South wind 9 to 13 mph, with gusts as high as 25 mph.
Saturday
Mostly sunny, with a high near 66. Breezy, with a southwest wind 8 to 16 mph, with gusts as high as 30 mph.
Saturday Night
Mostly cloudy, with a low around 44. Southwest wind 7 to 11 mph becoming south southeast after midnight. Winds could gust as high as 24 mph.
Sunday
A slight chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 69. South southeast wind 5 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.
Monday
Showers likely, then showers and possibly a thunderstorm after noon. High near 59. Chance of precipitation is 80%.
Monday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.
Tuesday
Mostly sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Mostly sunny, with a high near 63.
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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:
1:02 pm MDT Sep 24, 2026
Forecast Valid:
2pm MDT Sep 24, 2026-6pm MDT Sep 30, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation