Bozeman, MT (59718) Today Thunderstorms likely. A few storms may be severe. High 67F. Winds SW at 10 to 15 mph. Chance of rain 80%.. Tonight Showers and thunderstorms likely. A few storms may be severe. Low 47F. Winds SW at 10 to 15 mph. Chance of rain 90%. Updated: May 31, 2018 @ 2:08 pm