> It does not snow in summer.

I always took it this was being sung in (or about) winter.

.... Ooooh, this takes me back: my favourite record when I was a youngster was a 78 RPM, which used the chorus of this as the intro and outro for a three-minute comedy patter. (I understand that that was the standard MO for a music-hall act.)

I only grepped --- sorry! --- searched for this on a whim. Good to see the full lyrics after all these decades.