When summer starts, it’s time to fire up the grill, bust out the sunscreen and dig out the bathing suit because the pools open this weekend. We all look forward to enjoying our yards, sunny weekend day trips and fun summer festivals. These are my favorite parts of summer: the cookouts, the festivals and enjoying the pool on a particularly hot day.

But the part of summer I don’t look forward to is the Baltimore/DC area humidity. The mugginess that’s so thick, you feel like you can cut the...