NWS Forecast for: Mammoth WY Issued by: National Weather Service Riverton, WY Last Update: 1:43 pm MDT May 16, 2025

Hazardous Weather Outlook This Afternoon: Scattered showers and thunderstorms. Mostly cloudy, with a high near 51. West southwest wind 6 to 8 mph. Chance of precipitation is 40%. Tonight: Showers and thunderstorms likely before 3am, then isolated showers between 3am and 5am. Mostly cloudy, with a low around 38. West wind 5 to 8 mph becoming calm. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Saturday: Isolated showers and thunderstorms after 4pm. Partly sunny, with a high near 60. South wind 6 to 10 mph. Chance of precipitation is 20%. Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 42. Southeast wind 6 to 9 mph. Chance of precipitation is 70%. Sunday: Showers, with thunderstorms also possible after noon. High near 49. South southeast wind 6 to 8 mph becoming west northwest in the afternoon. Chance of precipitation is 100%. Sunday Night: Showers, mainly before midnight. Snow level 8100 feet lowering to 6500 feet after midnight . Low around 36. West northwest wind around 8 mph. Chance of precipitation is 80%. Monday: A chance of rain and snow showers before 8am, then a chance of rain showers. Snow level 6500 feet rising to 7800 feet in the afternoon. Mostly cloudy, with a high near 53. Northwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. Monday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 37. Tuesday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 60. Tuesday Night: A 40 percent chance of showers before midnight. Partly cloudy, with a low around 37. Wednesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 63. Breezy. Wednesday Night: A slight chance of showers. Mostly cloudy, with a low around 41. Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 63. Breezy.

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

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