This time of year, I would go climate controlled if you can help it. Most of the stuff can actually handle pretty high temps, but you don't wanna risk it. If it's a house garage, that should be ok cause it doesn't really get that hot, but a metal storage type garage will get hotter than the outside air temps.
doesn't mean you can't cut a hole in the wall... in about 3 months my dad is going to come up and we are doing this to my garage... as well as had some insulation in the garage door... to help keep the cool/heat in
shouldn't be that big of a deal... only problem is cutting the brick... but that is really not an issue with the correct tools