ball pythons temperature

its been a little cold the past few days my hot spots are right at 92 but the temperature of my snakes are 86-88 just wondering whats normal for balls.

I've never actually measured my snakes temperature, but 86-88 sounds about right. It's fairly close to the center of the temperature gradient we provide in the enclosures...

thats what im thinking but i just wanted to get someone other views on it