Yeah, that's a good option. However those temps swings also mean that it's likely to get back down (or up) again the next day, and in the mean time I'm potentially running the thermostat.

I've also got an old brick house, which means that thermal mass is a thing in a way that's hard to explain to people who live in modern buildings, but the easiest way to understand it is to realize the house walls are a lot slower at changing temps than the air, which will also mess with the thermometer.