Grapes need heat and sun to grow, but you don't store your wine in the sun or in the heat. Long term, that's not going to be good for the storage of your cigars, but short term it should be ok.
As temp rises, so does the amount of moisture the air can hold, resulting in a drop in measured relative humidity. What this means practically speaking is that either 1) your media is going to introduce more moisture into the storage unit, increasing the absolute humidity, and your cigars will drink up that extra moisture too getting too wet, or 2) if no additional moisture is released into the storage unit, your cigars will shed moisture as the air draws moisture out, resulting in drier cigars. Neither is a particularly desirable result if your cigars were already where you wanted them, so you'll want to make seasonal adjustments for hotter and colder seasons.
Worse are temp swings, which can cause your cigars to crack from the changes, and in some circumstances result in mold, if you have condensation.