Frequency distribution refers to a set of frequencies with a  particular set of values into which a statistical population is  grouped. Relative frequency refers to data preâ¦sented in a table  that demonstrates the relative frequency of multiple  non-overlapping classes.
1 The annual average temperature in Florence, Tuscany, Italy is mild at 14.6 degrees Celsius (58.3 degrees Fahrenheit). 2  Average monthly temperatures vary by 18.4 C (33.1 F) which is a slightly low range. 3  The average diurnal temperature variation/ range is 11 C (19.8 F).
September is usually one of the most pleasant months of the year to be in Tuscany. It is still warm, with summer-like weather, but not hot. This year (2011), we have had an exceptionally hot September, but this is highly unusual. Usually, the first half of the month is hotter than the second half. In early September, most people are still going to the beach regularly.