Hiking Mt. Baldy

Hello - Is Mt Baldy a trail that you have to train for? I am 29 years old, in good shape and have hiked in the past (Malibu, Palos Verdes, Santa Barbara) but never on a trail like this one at an elevation this high. Think I can do it? Also, any idea what the weather would be like up there this time of year? I'd like to do it this week! Any advice would help a ton and be greatly appreciated! Thank you, David