I know I’m being silly, but my brain likes numbers like 5 and 10. I can’t imagine saying 10 to 13. And a 5 degree swing in C feels too big.

Yeah, but that’s because that’s what you’re used to with the F scale.

If you were estimating a number of tablespoons of sugar, you wouldn’t be estimating in groups of 5, because that’s crazy. You’re probably more accustomed to estimating one tablespoon at a time. Or, maybe measuring cups of milk.

Or, if you don’t cook very much, for estimating walking distances, you’re not estimating in groups of 5. You might group by quarter miles and say, “It’s a quarter mile away,” or a half or something.

There’s nothing special about thos scale. All of the supposed benefits are the reault of your familiarity with it. Had we been using °C the whole time instead, you would be estimating degrees two at a time instead of 5, and everything would be completely normal.