Been so long since I adjusted a thermostat I had to look. Shows about 17 C in the main part of the house. The porch/office where I spend most of my time has an auxialiary wall mount gas heater that does not have a thermostat, just a numbered dial. It is set very low and still my thermometer in the room shows 69-70F most of the time. I turn off the main gas furnace at night time as sleeping is better when its not so hot. 
And summer time? I have no need of a thermostat then. It hasn't been hot enough for AC in here since 1988. (Obviously I don't have or need AC).