It was to Mandal (via Kristiansand and Oslo) around the month of June, so it was the “peak” time to go. The temperatures were around 65-75F, and cool at night (so overall not too hot and not too cold). The Norwegians were lively and very friendly people. Tourist areas were crowded but not overflowing with people. The food was so-so, but that was not a factor as there were plenty of choices.
Fly into Oslo and then take the train to the south was how I did it and seemed “cheapest.”over 6 years ago