I am storing my beer in one of the back bedrooms, which for the most part works out great. In the winter the bedrooms are between 70-72 F and in the summer I when kick on the AC I plan on getting one of those deflectors to put on the vent so it blows directly on the Fermentor, which(if I have the central air set to 74 F) should keep the beer at 70 F or so. But spring seems to be a PITA. Its 77 F in the house right now(76 F out). I really don't want to kick on the AC just for a couple of hours (especially since it is suppose to get down into the 40s F tonight). Will a few hours at 77 F cause much trouble? Is there any simple(cheap) way to stabilize the Temp? Is it only during active fermentation that off-flavors develop? Anything I have in the secondary or in bottle should be fine, right?
I really don't want to buy a fridge and temp control if I am only going to use it for a month or so.