At the beginning of the month the weather is moderate sunny and warm but as the end of the month approaches the weather is getting cloudier. The average rainfalls over 13 days is approximately 45mm. Average day temperatures are from 15°C to 19°C, which drop sometimes to even 10°C. As the autumn is already in the city, the sunlight hours are decreased to 9 hours with only 5 sunshine hours. Two weeks long, Musikfest is the most famous festival in Berlin in September. The biggest advantage of visiting Berlin in September is the moderate weather, the lively atmosphere and the busting town streets. It is recommended to visit Berlin in September because you can see most of the attractions and you do not need to make your way through the crowds, you can enjoy most of the events and the weather is still moderately sunny and warm.