I don't think its abnormal and you are right that it is probably because of all the precipitation. It is normal for all living things to grow a little mold on them and white mold isn't too bad. The mold you have to worry about in your house is black mold or Stachybotrys which can cause allergies and major upper respiratory problems. But stachybotrys normally grows in places where there may be a water leak that hasn't been addressed in a long time. It normally grows on the walls or behind the walls or in your flooring.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.