Yea, better bring 'em over to my house. I'll keep them climate controlled for you. Seriously the humidity is worse than the heat. I would keep them in the house especially if near the coast. But really the manufacturer will advise you best.
the garage
We just moved because of work, and do not have a listening area in the rental house. We will probably stay here for at least a year before building or buying. Is there a problem with storing my JM lab micro utopia berrylium speakers and rel studio2 woofer in the garage? I have the original packing material. We get 4 full seasons where I live, hot and very humid in the summer and cold in the winter. Will this cause a problem?