The freezing temperature matters far less than you think. There is "latent heat" that must be added to ice to make it melt and removed from water to make it fre

The freezing temperature matters far less than you think. There is "latent heat" that must be added to ice to make it melt and removed from water to make it freeze. Just the other week we had a wintry mix of precipitation at a nice and balmy 0.5 C which resulted in accumulated snow and ice, despite never being below freezing at ground level. It even warmed up through the day slightly to 1.7 C or so but the ice and snow never completely melted as there wasn't enough heat to overcome the latent heat of vaporization needed. And as mentioned elsewhere, it's not exactly difficult to remember "32 F is freezing", even the most dense Americans have figured that out so it's another metric solution to a problem that doesn't actually exist in America.