Is the south different than the North?

In Chicago it is common for people to wear shorts when it is 68 Fahrenheit which is 20 Celsius but in the south in South Carolina when it is 77 Fahrenheit about 25 Celsius they put on long pants.

Do people in the south have different perception of heat? They use to 95 Fahrenheit about 35 Celsius summer weather and feel colder when it is 77 Fahrenheit about 25 Celsius they put on long pants.

Has anyone else here notice this about the south different than the north? That north is wearing shorts when it is 68 Fahrenheit which is 20 Celsius which is really chilly for south.