As others have said, 38% chance could many anything. The poster that said it could be pouring at MIB and transformers is bone dry wasn't exaggerating. Its really that crazy. I live here and we had a zero percentage chance one day but 330 rolled around and its pouring. Other days we'll have an 80% chance and won't get a drop. Last week it got down to 28! 4 days later it was 84. So yes, come prepared for everything, layers are your friend.