I read this expression in scrappedcola's comment on this question. I never encountered it before, and fail to translate it. What does it mean?
Context:
[…] If you have someone [to ask] you should go to them. It could be seen that
you are only a fair weather student but depending on the circumstances
changing groups might not be a bad thing.
Best Answer
A "fair weather X" is someone who is X, but only when it's easy. In this particular context, they're talking about being seen as a fair weather student, which is someone who bails on their studies when the going gets tough. A more common usage of the term is "fair weather friend", which is someone who seems to be your friend, but is nowhere to be found when you need some help.