How hot does it have to be for snow to melt?

How hot does it have to be for ice to turn into water? Its the same thing. Ice melts at anything above 0º Celsius (32º Fahrenheit). Both the air and ground temperature would have to be above 0º. If just the air temperature was above 0º, then you would end up with sheet ice, as the top snow would melt to be re-frozen when it comes into direct contact with the ground.