I agree this is probably all subjective. Climo IMBY in April is 60’s and the period from April to early June is our best shot at what I consider “nice” weather, so I don’t like it when we lose part of that to 40’s and lingering cold (I’d be especially pissed if it happened after this awful winter too).
Admittedly I’m not a cold lover so yeah, I consider 40’s cold... I don’t ski, but I can’t imagine myself skiing in -10 temperatures.