The temp range you quoted is about perfect - most people say slightly higher humidity - 50% plus. I haven't the space or money to dedicate an decent sized area of my house to those kind of conditions so also keep mine stored at roughly 67 deg AND in the dark - An important point to avoid UV damage to wine.57-60 degrees F and 40% humidity pop to mind for perfect cellar conditions but I am not 100% sure. I would have to look up what the consensus is. I think it is more important to keep constant temps for the conditions you have. I try to keep my dining room area where my wine is stored around a constant 68 degrees.