Hehe, yeah the season is very short but it all depends on where in Sweden you live. It is a very stretched-out, "high" country; for example I live closer to Berlin/Germany than to the northernmost parts of Sweden. So in the southern parts I would guess they typically have a 7-8 month season (march-october in the best case), a bit further up north where I live but by the sea we have maybe 6-7 months (april-sept/october). Way up north they have only a few months! But people are inventive and play with orange balls on snowy greens... :) Many golf-nerdy swedes tend to take 1-2 golf-related vacations during the winter months.
Generally I would say the pro swedes are from the mid-to-southern parts and move to warmer countries when they have the money for it. Stenson lives in Dubai and Robert Karlsson in southern France, for example (they are both in the EU Ryder cup team). Fredrik Jacobsson who plays in US on the PGA tour is from where I live though and quite a few of the good women are from my home club (Helen Alfredsson is one example, the Solheim cup captain for Europe).
BTW, I just heard Stenson is gonna play full time on the PGA tour next year and is moving to a newly built house by Lake Nona in Orlando.