Leaving For Baltimore, MD....?

I'm leaving for Baltimore in a while & i've heard that it's EXTREMELY humid. the problem is i have wavy-ish/ curly-ish beach hair and i'm afraid it's going to frizz! which will not be good. i always leave my hair down in its natural state and i just don't want it to frizz!!! how can i prevent the humidity from poofing up my hair? Oh and also what should i expect the weather to be like? i'm going to be there from early August to mid August. Any suggestions on what to pack? Thanks in advance.(: