Travel Channel

I'm planning a trip to Cancun for mid-september. I'm just a little worried about the weather. I know it's hurricane season, but I'm also concern about strong winds and rainy days.
Can anyone tell me if I should be concern about the weather? Can anyone tell me their experience in Cancun in september?
Also, would you recommend staying in a All-Inclusive or not? I'm thinking of staying at a hotel and just figure out where to eat there. We are vegetarians and don't drink much...!
Thanks for any reply!