You do have humidity there right? If not prepare yourself.
We had it back in upstate NY during the summers, although it really couldn't compare to the 6 months I spent as part of a Marine Detachment at Redstone Arsenal in Huntsville, Alabama. It was 95 degrees with 90% humidity daily during the summer time in Huntsville. Germantown should be about the same, give or take.
Here in San Diego, it's pretty dry unless you're within 2 miles of the coast.