The midnight sun is a phenomenon that can be observed north of the arctic circle in the summer months. This is when the sun never sets.
In the period from April to August it is possible to see the sun at midnight or even for 24 hours. However, the Midnight Sun periods differ depending on the city or region:
| Location | Midnight Sun period |
| Arctic Circle | June 12 - July 01 |
| Svolvær/Lofoten Norway | May 28 - July 14 |
| Tromsø, Norway | May 20 - July 22 |
| North Cape, Norway | May 14 - July 29 |
| Longyearbyen, Svalbard Norway | April 20 - August 22 |
| Arjeplog, Sweden | June 13 - July 28 |
| Jokkmokk, Sweden | June 09 - July 02 |
| Gällivare, Sweden | June 05 - July 06 |
| Kiruna, Sweden | May 29 - July 11 |