I think its an eightys movie, but not sure. We watched it in my sixth grade english class. Pretty sure its based off a book.
This little girl lives on a different planet, with lots of other kids. Anyway, it rains a lot, but its acid rain. And the sun doesn't come out very often, when it does, it's a big deal.
Anyone remember the name of this movie?

All Summer in a Day (1982) (TV) (http://www.imdb.com/title/tt0195517/)

Thanks.

You're welcome.