average monthly temperature in fahrenheit in florence italy
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 average diurnal temperature variation/ range is 11 C (19.8 F). 2  July is the hottest month (fairly hot) with a mean temperature of 24.15 degrees Celsius (75.47 degrees Fahrenheit). 3  January is the coolest month (cool) having an average temperature of 5.75 degrees Celsius (42.35 degrees Fahrenheit).