What is the biggest temperature change you have experienced while outside? I lived in South Alabama years ago and went hunting one morning. I was wearing a T-shirt and pants and broke a sweat walking to my tree stand. The temperature was close to 80. A front blew in while I was sitting in the stand and I began to get cold. By the time I walked back to the truck less than 3 hours after walking in I was shivering. When I got to the truck and started warming up I turned on the radio and the local broadcast said the temperature was barely above freezing with a hard freeze expected that night. It had dropped over 40 degrees in less than 3 hours.