Definition. Simple or arithmetic average of a range of values or quantities, computed by dividing the total of all values by the number of values. For example, the mean of 1, 2, 3, 4, and 5 is (15 Ã· 5) = 3.
Sea Temperature. 25Â°C (77Â°F) in July. The average maximum daytime temperature in Sicily in July is a hot 30Â°C (86Â°F), while the average minimum night-time temperature is a warm 22Â°C (72Â°F). On average 4 mm (0.2 inches) of rain normally falls in Sicily during July with rain falling on 1 days of the month.You can expect on average 11 hours of sunshine a day in Sicily during July.n average 4 mm (0.2 inches) of rain normally falls in Sicily during July with rain falling on 1 days of the month. You can expect on average 11 hours of sunshine a day in Sicily during July.
Sicily Weather. Sicily Weather and When to Go. April to June and September to October are the best months for visiting Sicily when temperatures are mild and you would find fewer crowds. Summer is very hot and dry, busy, and very crowded, especially in the tourist areas. August is the worst month to visit Sicily.