Like the mother Italy’s island plains Verona too has a humid subtropical climate. With oppressive heat in summers and humid winters (humidity remains high throughout the year).
Practically every Verona travel guide will tell you that March to May (spring) is the ideal time to go, this is when all the Verona tourist attractions are open and there is a pleasant atmosphere all around. May is the busiest month for Verona.
If you are not fond of summers, winter will be a great time for trips to verona i.e. November to February. During this time fog is accompanied by frost and it’s ideal for skiing and view the sights while there is minimal crowd.
Summer (June to Aug) is most popular month to travel to Verona. However, temperature is likely to rise drastically. If you don’t mind the heat it is the best time as there are a couple events at the Verona arena.