I have a rough idea of some temperatures and what they convert to i.e. 21C is a reasonably nice day, 38C is bonkers hot, 5C or so is normal autumn or early winter, but drop too far below the freeze-thaw point and I get lost. -22C sounds about right, too - gah! That'd put it around -20C here.

Glad to know I'm not the only one who struggles with conversions.