I’m not condoning cold or cool temps, but I was taught to fear the over heat more. I have no fear of mid or low seventies. But anything higher then low nineties I am not a big fan of. I’ve kept tropical snakes in a cold climate, but it’s the over heat that scares me. Personally I keep my high at 88/90, lows of 76/74. Just my two cents. I totally agree with Pit.