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).
Averages for Rome in September. The weather continues to cool down in Rome, Italy in September, although the city is still pleasantly warm. At the beginning of the month, the average temperature starts off at 23Â°C and slowly drops until it reaches 19Â°C in the final few days of the month.