I was unable to take my pet Turtle with me to VT as getting live food is problematic and a heat outage could be fatal. The coldest it gets is around -3 and that is brief.
I have already endured three nights of -6 and it is going to get worse.
Reptile unlike you and I are cold blooded. Their body temperature is a reflection of the surrounding temerature. Baron loves no A/C in the summer and is comfortable at 90 plus. However , he gets uncomfortable as we get around 50. The area where his tank was kept had a draft and the water temperature was around 50.
I came home changed the location of his tank and he is 100% fine. He has a UV bulb and is enjoying a tanning salon. In fact he will not leave the heated section. The UV rays also restore his orange stripes to their fullest colors.
He is up there at 31 years of age and the lifespan of well maintained turtles of his species is believed to be fifty. However we know less about turtles then dogs and cats. The real number may be in the seventies as the availability of live food is a recent event in the last fourty years.