I am in northern central florida about 49 miles north of orlando. Ironically enough about the only lizards I have not kept outside are my waters (I am working on that this year after some delays on it.) but I have kept just about everything else outside lizard wise. If you are experienced enough at it and know how to read your animals and the weather patterns and the relationship between the two well you will learn there is a lot you can get away with temperature wise.

As long as you are getting a sunny day that is reasonably warm you can very easily get away with ntls of 60f and probably a bit lower than that (upper 50s) but it is VERY important that you get some sun and warmth the next day. Having a hide box with supplemental heat and plasticing up your cage when temps start to cool down can help greatly with this and can allow you to keep your monitors outside longer than you normally would otherwise.

Just to give you some examples of things I have kept outside (this could be a long list so I keep it short.) I kept green iguanas for over 15yrs and the only time I kept them inside was when I first got them (I lived in N.Y. state.) and once I moved down here only when night-time temps would get into the upper 20's. Their cage was covered with 6mil plastic usually from around Thanksgiving weekend untill about the end of Feb. or the beginning of March. They also had a hide box with supplemental heat. Adult Green Iguanas can handle temps into the low 40s with no problem at all minus the plastic and supplemental heat babies are a different story.

I kept Mali uromastyx outside for several years with no supplemental heat and would only cover their cage with plastic when night-time temps would drop into the low 30s or below and/or if it was going to be cool and overcast during the day. They pretty much hibernate for a good chunk of the winter here. I keep malaysian leaf turtles outside when temps still go down into the low 50's at night and they do fine.

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