NWS Forecast for: Mammoth WY Issued by: National Weather Service Riverton, WY Last Update: 6:01 pm MDT Jun 10, 2026

Tonight: A chance of rain and snow showers, mainly before midnight. Some thunder is also possible. Snow level 6700 feet. Mostly cloudy, with a low around 35. Northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 30%. Little or no snow accumulation expected. Thursday: Sunny, with a high near 67. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 23 mph. Thursday Night: Mostly clear, with a low around 38. West southwest wind 5 to 13 mph becoming south southeast after midnight. Winds could gust as high as 25 mph. Friday: Sunny, with a high near 74. South southeast wind 5 to 14 mph becoming west southwest in the morning. Winds could gust as high as 30 mph. Friday Night: Partly cloudy, with a low around 43. West southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 29 mph. Saturday: A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 63. Light north northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 20%. Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 39. North wind 5 to 10 mph, with gusts as high as 23 mph. Sunday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 62. Sunday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 38. Monday: Mostly sunny, with a high near 68. Monday Night: Partly cloudy, with a low around 42. Tuesday: Mostly sunny, with a high near 76. Tuesday Night: Partly cloudy, with a low around 48. Wednesday: Sunny, with a high near 81.

Mammoth WY  44.98°N 110.69°W (Elev. 5745 ft)

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