When is the best time to go to Nashville? Weather wise and festival wise?
Fan Fair is the biggest music fest.
It is in June...summers can get pretty warm and humid.
Here is a website for that particular fest.
June is alot of fun here, there's FanFair and Bonnaroo. Nightlife picks up quite a bit in the summer too so there's plenty of people out and about. It's definitely hot in June, so make sure you stay somewhere with a pool.