I spent 4 days in Copenhagen in early May. As you can see from the pictures, the weather was great. The city is so picturesque it was almost point anywhere and click to get a memorable picture. Copenhagen is NOT cheap, but if you are only there for 3 or 4 days, it's not too much to pay for the experience - especially if you eat street food at least some of the time and use public transport like I did. I found both the locals and other tourists to be chill - so it was great to wander around. If you only visit one city in Scandinavia, I would strongly recommend Copenhagen.
Pictures -
1 - Nyhavn in the evening.
2- Nyhavn during the day
3 - Kayaks on Christensen Canal
4 - Boats on Christensen Canal
5 - A view of Christiansborg Palace from the canal
6 - Copenhagen Harbour Bus