Unfortunately, sun and leather don’t usually mix well. Too much sunlight will do one of two things (and possibly both) to leather furniture and other upholstery– fading and drying.
Fading is commonly seen in semi-aniline and aniline leathers, but is a little rarer in fully-finished leathers that have a protective top coat. It’s one of the most common problems we see, and if you put leather furniture next to a window that gets some serious sunlight, you can start to see fading in as little as 4 to 6 months.
Drying, on the other hand, is something the sun will do to almost any kind of leather – fully-finished or not. The heat of sunlight causes the moisture in the leather’s natural oils to slowly evaporate, and eventually, it will dry, stiffen and crack.