| NWS Forecast for: Mammoth WY Issued by: National Weather Service Riverton, WY Last Update: 8:31 am MDT Oct 6, 2026 | |
| Today: Sunny, with a high near 78. Calm wind becoming northwest around 6 mph in the afternoon. Tonight: Mostly clear, with a low around 44. West northwest wind around 5 mph becoming light and variable. Wednesday: Sunny, with a high near 76. South wind around 5 mph becoming calm. Wednesday Night: Mostly clear, with a low around 43. West northwest wind around 5 mph becoming light and variable. Thursday: Sunny, with a high near 75. Southeast wind around 5 mph becoming calm. Thursday Night: Mostly clear, with a low around 43. West southwest wind 5 to 8 mph becoming south after midnight. Friday: Sunny, with a high near 73. Breezy, with a south wind 7 to 17 mph, with gusts as high as 30 mph. Friday Night: Partly cloudy, with a low around 44. Saturday: A 30 percent chance of showers. Mostly sunny, with a high near 66. Saturday Night: A chance of rain showers before midnight, then rain and snow showers likely. Mostly cloudy, with a low around 37. Chance of precipitation is 70%. Sunday: Rain and snow showers likely. Some thunder is also possible. Mostly cloudy, with a high near 49. Sunday Night: Rain and snow showers likely. Some thunder is also possible. Snow level 7600 feet lowering to 5800 feet after midnight . Mostly cloudy, with a low around 30. Columbus Day: A chance of rain and snow showers. Snow level 5800 feet rising to 7900 feet in the afternoon. Partly sunny, with a high near 51. | |
| Mammoth WY 44.98°N 110.69°W (Elev. 5745 ft) | |
Visit your local NWS office at: https://www.weather.gov/riw |