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).
Dec 14, 2010, 12:53 PM. I spent a week in Tuscany in late September this year and the weather was brilliant: no rain and 25 deg C during the day and cooling to around 18 at night. No need for air-conditioning but warm enough for pool and beach. An excellent time to be in Tuscany.