How long to store pecan pie at room temperature?

It is not recommended that you ever store pecan pie at room temperature. If left out at room temperature, the pie can become a health hazard. USDA regulations state that any perishable food such as a pecan pie must be kept at 40 degrees Fahrenheit or colder to prevent the growth of bacteria. Any baked product without proper refrigeration will start growing mold within a few days. So, always refrigerate your pecan pie and let it cool before covering and storing to reduce the risk of condensation.