The baby was pronounced dead at Primary Children's Medical Center on Friday, said Layton police Lt. Garret Atkin.
Police said the child's mother forgot her 5-month-old son was in the car when she parked outside a friend's house in Layton.
The incident took place about 2:30 p.m. on June 17, said Sgt. Shawn Horton. Hadley discovered him in the car about two hours later - a "horribly long time," Horton said - and took him to the hospital.
Temperatures inside a parked car typically are 20 to 30 degrees higher than the outdoor temperatures, which ranged from 86 to 89 degrees the afternoon of June 17, Horton said. The vehicle was parked in a driveway in direct sunlight.
No criminal charges have been filed in connection with the death. - Ana Breton
