Ok hear me out. I've lived in the US and in Europe, and while Celsius makes sense for all sorts of things (cooking, car engines, PC temps...), I think Fahrenheit actually makes a surprising amount of sense for climate, indoor and outdoor.
While Celsius 0-100 is linked to the states of water, Fahrenheit is loosely a 0-100 on "how is this for a human to experience". 0°F is sorta the limit of "dang that's really cold" and 100°F is "dang that's really hot." And that's the whole reason we look at the weather report.
0-100°F also has more individual degrees than -18-38°C, and when a couple degrees can make a big difference for indoor comfort (or the heating bill), I appreciate more granularity.