Everyone answers that question differently. Someone in they northeast may say 85 is too warm and they'll stay inside in the AC, and a southerner might argue that 85 is a chilly summer day. It's all relative. So how hot is too hot for you?
I really struggle this time of year. January is always tough for me but throw in a two + week inversion and I am down right depressed. I have come up with some ways to survive this inversion until the storm comes.