For most people, figuring out the optimal indoor temperature in winter is a balancing act between comfort and keeping heating bills as low as possible. Everyone has their own preference for what is a reasonable temperature for a house in winter, but the consensus from most sources is 68° F.
Does that mean you should set the thermostat at 68° in the fall and leave it there until spring? There are differing viewpoints on this. For some people, 68° F. is too hot for sleeping, so they drop it a few degrees at bedtime. Some say, however, that doing this wastes energy, as it takes less energy to keep a house at a steady temperature than it does to reheat your home after letting it cool to say, 62° F. This depends on other factors, such as insulation, windows and doors. A well-insulated home holds heat longer and loses it slower, making the reheating period much quicker. In that case, I think dropping the temperature at night makes sense. A poorly insulated home with old, drafty doors and windows might be a different story. It’s super easy, with modern thermostats to program different temperatures for different times of the day.
If you go with the method of cooling at night and when you’re at work, also consider your floors. Do you have hardwood or tile? If so, it’ll take longer to warm up the floor than it takes to warm up the air. But that’s easily remedied with a warm pair of slippers.
So, the answer to the question “what is a reasonable temperature for a house in winter?” isn’t black and white. Whatever temperature setting you find is comfortable for you and keeps the heating bill reasonable is your answer. But remember, unless you live alone, you’ll likely have to come to a compromise; some household members might just need to bundle up a bit in the chilly months.