I have a new toy, a birthday gift from my parents. It’s a temperature/humidity datalogger (this one— one of the few compatible with Macs). Basically, this gizmo keeps a constant internal log of the temperature and humidity, at intervals you specify (every second, every hour, whatever you like). Then when you want the data, you plug it into your computer’s USB and all the stored information downloads. The software makes lovely graphs, and you can export the data to Excel for further manipulation. It’s very cool. If you find such things cool. I stuck it on the underside of the kitchen island.
The nights, as you can see, produce lovely “decay” curves as the house gradually cools (the first night it was about 30º out, the past two have been warmer.) The steepest upswing, on Day 1, was a brief fire– you can even see a blip where it started to die, and J. added a second log. The more curved upswing on Day 2 represents a bit of space-heater use. All the other small upticks are making coffee, french toast, grilled cheese… Overall, our temperature over this span averaged 59ºF.