The average temperature in Sicily in September is 21 degrees Celsius, or 61 degrees Fahrenheit. The lowest temperature for September is 17 C, or 62 F, and the highest temperature is 24 C, or 76 F.
TripAdvisor states that September to October is the best time for visiting Sicily because of mild temperatures and a less crowded environment. Summers in Sicily are very hot and dry, and the area is crowded with lots of tourists. In September, the sun shines for an average of 11 hours per day, with rainfall averaging 28 millimeters per day. Holiday Weather recommends September as a great time for a tour to Sicily with beautiful blue skies and plenty of sunshine.