[action]
Really. [Not a question, because he believes her. There are about a million other questions whirling through his head, though, so many inquiries about how that would work, that he can't pick one out.]
They usually move a lot more slowly than this. A season takes up a few months at a time, not a week or two, and the transition is a lot more gradual.
[Finally, one innocuous question pops into his mind.] What weather does your world default to, then? Warmth, cold, rain?