Seasons in the part of Alberta I'm in go something like this:
Spring - April (occasionally starts mid march)
Summer - May, June, July, August
Autumn - September, October
Winter - November, December, January, February, March
It doesn't take long to get hot once the last of the snow is gone, which is why spring tends to be short here.
So, from my perspective at least, the barovian winters are short, and balmy.