Is it safe to leave pork loin out over night cool again and then cook it?

It is not safe to leave pork loin out overnight at cool room temperature and then cook it. Pork is a perishable food that can easily spoil at temperatures between 40°F and 140°F. Leaving it out at cool room temperature for an extended period of time can allow bacteria to multiply to unsafe levels, increasing the risk of foodborne illness.

Pork should only be left out at room temperature for a maximum of two hours before it must be refrigerated or cooked. If you plan on cooking the pork loin the next day, it should be stored in the refrigerator overnight and cooked within one to two days for best quality and safety.