it depends on your room, and how much you play/baby your guitars. virginia gets pretty humid year round, but my mom keeps the humidity in the house low with a dehumidifier. also, it depends on how cheap your pups are.

if they are cheap, they probably are more suseptible to problems. for strat pups especially, if water gets under the plastic part, it would be very easy to rust out all the coils inside, etc.