@luckymama64 My Florida child just spent her first winter at Dartmouth and loved it. She too wondered how she would fare but beyond a momentarily thought at first, it never crossed her mind again. Dartmouth was everything she had wanted, snow and cold were not going to keep her from it. She took a PE class in Nordic skiing during Winter Term. It was definitely a new experience!
Your daughter will find that there are plenty of opportunities for exercising both indoors and out. The Dartmouth Outing Club offers year round activities and the range is extremely broad that she would certainly find something to pique her interest.