Did I miss the range of your thermostat in the options I gave? Feel like telling me why you have your thermostat set to a certain temperature? I'd love to hear all about it!
To be fair, our thermostat is set at around 65F (18.33C), which means that it is reading about 60F (15.56C). When my husband was sick, we had it set as high as 70F (21.11C). But then we got our electric bill, and decided that putting on socks and an extra sweater were better ideas.