Yes! She has a very good shot at Wellesley ED 2. Can you afford it?
Take a look at results for this student who appplied to LACs this year. I suspect she would have gotten into Tufts too, had she applied ED or somehow convinced them she would attend, if accepted. Chance Me - DD 35 ACT; 4.0 uw GPA; Swarthmore ED
EDs are reaches by definition. Of course you will make sure that she applies to safeties. And BTW, early sept can be very hot and humid, fall can be gorgeous, winters have been getting milder, and spring can be glorious, so do not fear the weather as much as you might.