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).
The regions of central Italy include Lazio and Tuscany (Toscana) along the west coast, Umbria in the interior and Marche on the east coast. The highest weather station of this group sits at 1875 metres (6150 feet) on Monte Terminillo. September temperatures: daily averages.