Red Eared Slider Tutle habitat

Question
I found my red eared slider turtle burrowed in the dirt. Is the weather change in Fresno CA going to be an issue for her? She has been living outdoors since August.

Answer
It doesn't sound as though you want to allow her to continue to stay out.
You may want to do some research on how to allow your turtle to brumate safely, and then decide whether you want to allow this:

http://www.austinsturtlepage.com/Articles/hibernation.htm
http://www.redearslider.com/hibernation.html
http://www.tortoisetrust.org/articles/Refrigerator.htm
http://www.chelonia.org/Articles/hibernationpaula.htm