On mine I get low 80's in summer and low 70's in winter in coastal NC where the cars are always garaged and temps rarely get below freezing. I never use the heater or the AC. Driving style does matter as mentioned. My wife's coupe gets 5 to 10 miles per charge less than my cabriolet, but I take it as a challenge to squeeze out as much range as I can. 
First thing I'd do if I were you would be to make sure that the 12v battery is not the original. Draining that can ruin your whole day if you've read some of the posts here.
Len
2014 EV Coupe 21,500 miles
2014 EV Cabriolet 22,000 miles
First thing I'd do if I were you would be to make sure that the 12v battery is not the original. Draining that can ruin your whole day if you've read some of the posts here.
Len
2014 EV Coupe 21,500 miles
2014 EV Cabriolet 22,000 miles
