Hi, I just moved to Sweden and its surprisingly warm here during the Summer - and throughout the whole year.
Really, I thought is super cold there during the winter.
I thought the same thing - but as I learned very recently - the climate here is heavily influenced by oceanic winds. 
oooo that makes sense, but doesn't it snow a lot there?
Depends on if you live in northern or southern Sweden: in the north it's like Siberia; in the south it snows a few times a year but quickly melts away in days or weeks.