NWS Forecast for: West Yellowstone MT Issued by: National Weather Service Great Falls, MT Last Update: 5:31 pm MDT Jul 21, 2026

Flood Watch Tonight: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Mostly cloudy, with a low around 49. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%. Wednesday: Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 83. Calm wind becoming west around 5 mph. Chance of precipitation is 70%. Wednesday Night: Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then a chance of showers after midnight. Mostly cloudy, with a low around 48. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 82. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 60%. Thursday Night: Partly cloudy, with a low around 47. Light and variable wind. Friday: Sunny, with a high near 87. Light and variable wind becoming west southwest 6 to 11 mph in the afternoon. Winds could gust as high as 23 mph. Friday Night: Partly cloudy, with a low around 49. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 22 mph. Saturday: Sunny, with a high near 88. Light and variable wind becoming southwest 11 to 16 mph in the afternoon. Winds could gust as high as 28 mph. Saturday Night: Partly cloudy, with a low around 48. Sunday: Sunny, with a high near 87. Sunday Night: Partly cloudy, with a low around 47. Monday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Monday Night: Mostly clear, with a low around 46. Tuesday: Sunny, with a high near 87.

West Yellowstone MT  44.67°N 111.09°W (Elev. 6686 ft)

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