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).
This report describes the typical weather at the Abruzzo International Airport (Pescara, Italy) weather station over the course of an average September. It is based on the historical records from 1974 to 2012.Earlier records are either unavailable or unreliable.he air is driest around September 1, at which time the relative humidity drops below 60% (mildly humid) three days out of four; it is most humid around September 20, rising above 91% (very humid) three days out of four.