When the temperature starts to dip here in Northwest Ohio, the thermostats inevitably rise. Before Gideon was born JQ and I were of the mindset that you put on an extra pair of socks or a sweater and keep the furnace down as much as possible. At night we would turn it down to 65° or lower in the dead of winter. Our bedspread is warm and we could snuggle up. Sleepy in our skivvies was still comfortable. Getting out of bed in the morning was another story. How quick could we find socks and sweats before we froze our little white asses off? Pretty quick.
Now that Gideon is around we've had to adjust our thinking on the low temps. We aren't outrageous with it—but when you have a little guy who doesn't understand how to pull the covers back over him, you got to give a little. Our thermostat goes down to about 68° at night in the winter and never rises above 72°. We usually keep it at 70° through most of the winter.
SInce we have a furnace that is a whopping 60% efficient, we are heat misers. Or maybe we aren't? If you live in climate with 4 seasons—what's your number? If you live in the warmer states, what do you consider cold? Is there a point where you actually turn on the heat?