I saw the title of this thread and thought somebody had another litter of ugly pink worms. Lol.

You're right though, pratty. When it comes to husbandry, garter snakes generally can tolerate being kept too cool, easier than they can tolerate being kept too warm. And, it is easier to fatally or harmfully overheat them, than it is to do the same with cold.

Personally, I've seen garter snakes survive overnight with temps in the upper 20's and recover by the next afternoon with no apparent harm. Then I've seen the same species die within minutes at 110 degrees.