I'm hoping the toughness of cascade and nugget will help with that, high humidity generally get plants by encouraging downy, powdery mildew and other funky messes. Good airflow around the vines should help.
I read they tried to grow them on in the Virginia area, no doubt they won't do as well here but the chances are 1 or 2 of the tougher ones should at least live.
Whether or not they will set cones and the cones will last in the humid/hottest part of the summer is another story.
If they die...
they die
we shall see