As a rule of thumb, I'd say if you're comfortable, a strung (glsss) bow would be comfortable (assuming that it's stored by hanging or laying horizontally by the string or limbs). If it's too hot or cold for you (especially too hot) I'd unstring it and again store it horizontally. If you're really concerned about storing your bows, you can send them to me and I'll store them for you! I'd even take them out and exercise them if you wish. Seriously, unstring the wood bows, leave glass bows strung or unstring them if you prefer, but always store them with as little outside stress on them as possible.