what is normal temp in sweden early in sept
wundergound.com is good place to look.
Remember that Sweden is a very long country, over one thousand miles long. That's the distance from Nova Scotia in Canada to Charleston, South Carolina. The weather at one end will be different than at the other end. What's the normal temp between Canada and South Carolina in early sept? The Wunderground link is very good. If you were more specific perhaps others would have first hand knowledge.