The post mortem conducted by pathologist Dr. Valery Alexandrov found Jadon survived the high morning temperature for almost two hours before he died.
Dr Alexandrov said persons who died in a similar manner endure a number of symptoms caused by high temperatures, which are caused by the increased concentration of minerals in the body caused by dehydration.
Baby Jadon died on Tuesday after he was left in the back seat of a car by his grandfather.
Reports state the man forgot about the child because he received a call informing him of his impending promotion while on route to dropping the child of at the regular baby sitter.
The child was found some hours later by his grandfather who had just finished work.