Don't get too hung up a set temperature. Be more aware of large temperature swings. Yes 60° is a great temperature to store wine at but if it near a heater, ac or duct work, that would not be good. Same with direct sunlight. I think your temperature at 45° would be ok but if you can adjust it, I would turn it up some. I don't store any of my wine chilled. Incidentally, 45° is way better than 85°.