Unless you go to northern Italy, it will be very hot (90s-100). The Lakes region or near the Italian Alps would meet your criteria. Lot of wine and good food, along with mountains.
We are going to Torino/Milan for 9 days in August and plan to visit some of the Lakes area. This is not a bike tour, but I have a feeling we might be convinced to do some riding while we are there.
I have ridden in Tuscany; get ready for lots of climbing, with scenery that makes up for it.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport