June and July: temperatures average 13–20°C, daylight stretches past 20:00, and most attractions and events run. Crowds are still manageable outside…
Late May and late August: 10–15°C, fewer tourists, hotel rates drop 15–25%, and you still get decent daylight and most sights ope…
Go in June or July for the best weather and long days; visit in September or late May for the best value.