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.
Wow, do a lot people live in the North of Sweden?
Well to give you an idea, the heavily populated capitol city of Stockholm is on the south-eastern coast.  The north has a lot of forests; and the south has a lot of farming.
I see, that makes sense. How is Stockholm, I heard its a nice small city.
Stockholm is very unusual: the entire city is actually located on a chain of fourteen different islands called, collectively, the Stockholm Archipelago. Interesting, no?
I would have never guessed that, sounds like some complicated engineering was involved.