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

Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain & Isolated Severe Thunderstorms in Southern California

Snow squalls are likely to cross the Lower Great Lakes this evening and the Ohio Valley through the interior Northeast/northern Mid-Atlantic overnight, before potentially reaching the I-95 corridor from D.C. to New York City early New Year’s Day morning. Heavy rain and isolated severe thunderstorms will impact coastal southern California including Los Angeles tonight into early on New Year's Day. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

36°F

2°C

Humidity 54%
Wind Speed SW 5 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 31 Dec 04:15 PM MST
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Partly cloudy, with a low around 25. Southeast wind 7 to 9 mph.

    Low: 25 °F

    Partly Cloudy

  • New Year's Day

    New Year's Day: A chance of rain and snow showers, mainly after 5pm. Increasing clouds, with a high near 39. South southeast wind 8 to 13 mph. Chance of precipitation is 30%.

    High: 39 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow showers. Snow level 5900 feet. Mostly cloudy, with a low around 33. South wind around 8 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain and snow showers before 11am, then a slight chance of rain showers. Snow level 6400 feet rising to 7000 feet in the afternoon. Mostly cloudy, with a high near 42. South southwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 42 °F

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. South southwest wind around 9 mph.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 46. South wind around 10 mph, with gusts as high as 24 mph.

    High: 46 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain and snow showers after 11pm. Snow level 7000 feet lowering to 6200 feet after midnight . Mostly cloudy, with a low around 34. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow showers. Snow level 6200 feet. Mostly cloudy, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain and snow showers, mainly after 11pm. Snow level 6100 feet. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 25. Southeast wind 7 to 9 mph.
New Year's Day
A chance of rain and snow showers, mainly after 5pm. Increasing clouds, with a high near 39. South southeast wind 8 to 13 mph. Chance of precipitation is 30%.
Thursday Night
A chance of rain and snow showers. Snow level 5900 feet. Mostly cloudy, with a low around 33. South wind around 8 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Friday
A chance of rain and snow showers before 11am, then a slight chance of rain showers. Snow level 6400 feet rising to 7000 feet in the afternoon. Mostly cloudy, with a high near 42. South southwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 35. South southwest wind around 9 mph.
Saturday
Partly sunny, with a high near 46. South wind around 10 mph, with gusts as high as 24 mph.
Saturday Night
A slight chance of rain and snow showers after 11pm. Snow level 7000 feet lowering to 6200 feet after midnight . Mostly cloudy, with a low around 34. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Sunday
A chance of rain and snow showers. Snow level 6200 feet. Mostly cloudy, with a high near 43. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow showers, mainly after 11pm. Snow level 6100 feet. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Monday
A chance of rain and snow showers. Snow level 5900 feet. Mostly cloudy, with a high near 41. Chance of precipitation is 40%.
Monday Night
A slight chance of snow showers. Mostly cloudy, with a low around 29.
Tuesday
A slight chance of snow showers. Partly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
A slight chance of snow showers. Partly sunny, with a high near 38.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
5:17 pm MST Dec 31, 2025
Forecast Valid:
5pm MST Dec 31, 2025-6pm MST Jan 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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