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.
Palermo: Annual Weather Averages. August is the hottest month in Palermo with an average temperature of 27Â°C (80Â°F) and the coldest is January at 13Â°C (55Â°F) with the most daily sunshine hours at 10.9 in July. The wettest month is November with an average of 130mm of rain. The best month to swim in the sea is in August when the average sea temperature is 26Â°C (79Â°F).