13 cities with 30-year climate records.
| City | Climate | Best time to visit |
|---|---|---|
| Oslo | June–September | |
| Bergen | June–August | |
| Trondheim | June–August | |
| Stavanger | June–August | |
| Drammen | June–August | |
| Lillestrøm | June–August | |
| Sandnes | June–September | |
| Fredrikstad | June–August | |
| Asker | June–August | |
| Sarpsborg | June–August | |
| Tønsberg | June–September | |
| Ålesund | June–September | |
| Skien | June–September |