A visit to Finland can be equally rewarding whether you visit in summer or winter. If you will be spending time in Finnish Lapland, then the winter months, from mid-October until the beginning of May, are when the area is at its most beautiful. But if you’ll be spending more time in the cities, then you should plan your trip for summer. The warmest day of the year falls in July, and north of the Arctic Circle, there are days where the sun doesn’t set at all in summer.