Thank you for the quick reply!
We have a hot tub in there and tropical plants that have never had a problem making it through the winter in the last 3 years. We keep the outside doors shut so the hot tub keeps it very humid and much warmer than the outside temperature.
When the sun is out, we open the door between the sun room and living room to help heat the house. So I'm thinking they will be ok.
I'll add leaves and grass clippings to an area away from the glass walls in case they decide to snuggle down.....and keep offering them fresh food and water throughout the winter?
Another question.....does it hurt them to not hibernate? Or if it's a warmer climate, do they no always hibernate in the winter?
One other question and I'll leave you nice people alone.....one of the red-earred sliders won't eat anything but the Purina One dog food that I put in their "pond".....will she be ok on that? She's the first one in the water after I clean it out and put food in there each morning.....it's like watching a small elephant make it's way through the jungle to see Alex rushing to the water! 
Thanks and have a great day!
Rottgirl