I live just an hour south of you, so I have pretty much the same temp. problems you do. I never really worry about humidor temp. within reason. I didn't even turn on the A/C until July and will turn it of as soon as the nightime temp. drops below 70. I keep my A/C set at 80-82when it is on. Just keep your cigars in the coolest room in your house, usually the north east one. Second, keep them away from an outside wall or direct sunlight from a window even for short periods. And yes, use beads. I know they can be a bit pricey but use them. I keep a few containers of them 'dry' so I can put them in any humidor that is getting too humid. Sometimes new boxes can be so wet they will sent your RH up when you first put them in and sometimes you can just put too much moist air in your humidor just by opening it daily to get out smokes.
Just as a note, if you want your wife to let you run the A/C, tell her how much the excess humidity is ruining all her precious things. Photos hate high humidity and any cloth items such as clothes, linens, and towels will get musty smelling in a very short time at RH above 80%. Some molds will even start to grow also, many of them invisible until they spore (then the turm black or brown usually). Also dust sticks to surfaces and makes them harder to clean when the R/H is high. If you have any furniture made of particle board (most stuff that is laminated is) it too will absorb humidity and become weak. Book shelves will sag, table tops will develope warts, ect. And besides 80 degrees is not that bad of a temp when you come in from the utside where it is 90.
Good luck!
Gene