NWS Forecast for: Old Faithful WY Issued by: National Weather Service Riverton, WY Last Update: 3:48 pm MDT Apr 20, 2026

Hazardous Weather Outlook This Afternoon: Partly sunny, with a high near 59. Southwest wind around 10 mph. Tonight: Mostly clear, with a low around 31. Southwest wind 5 to 8 mph becoming southeast in the evening. Tuesday: Isolated showers after 5pm. Mostly sunny, with a high near 63. South wind 7 to 10 mph. Chance of precipitation is 20%. Tuesday Night: Scattered showers, mainly before midnight. Mostly cloudy, with a low around 34. Calm wind becoming south around 6 mph after midnight. Chance of precipitation is 30%. Wednesday: A chance of rain and snow showers before 9am, then snow showers. Some thunder is also possible. High near 47. South southwest wind 6 to 10 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected. Wednesday Night: Snow showers. Some thunder is also possible. Low around 26. Southwest wind 7 to 9 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. Thursday: Snow showers. Some thunder is also possible. High near 39. West wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. Thursday Night: Snow showers. Low around 17. Chance of precipitation is 80%. Friday: Snow showers likely. Some thunder is also possible. Partly sunny, with a high near 34. Chance of precipitation is 70%. Friday Night: A 40 percent chance of snow showers, mainly before midnight. Partly cloudy, with a low around 10. Saturday: A chance of snow showers. Mostly sunny, with a high near 38. Saturday Night: A chance of snow showers. Partly cloudy, with a low around 14. Sunday: A chance of snow showers. Some thunder is also possible. Mostly sunny, with a high near 42.

Old Faithful WY  44.46°N 110.82°W (Elev. 7398 ft)

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