I’m asked all the time something along the lines of “What is the best temperature for my artwork?” or “What temperature should my house be?” or “What environment is best for my collection?” Well, its not a one word answer. The answer is kind of long, actually, but I think you’ll find the answer and the photos interesting.
What materials are you worried about protecting? A wood sculpture, an oil painting, a watercolor, glassware, a plastic toy collection, photographs, leather book bindings? Each material reacts to it environment a little different but by and large the answer to this question is, thankfully, not a single number temperature (that would be hard… and expensive… to try and maintain!). Its a range. My detailed answer to this question would be different for someone in Florida than Wyoming, or for someone living in Puerto Rico or Utah. But in general, what your items need, much like all of us, is stability.