Now that winter's come,
The impulse to drink returns -
Proof against the cold.
Well, I say the cold - the idea we often call 'the beer coat', alcohol reducing your sensitivity to cold. (Doctors, of course, always insist that in fact alcohol increases your susceptibility to hypothermia; but one of the cooks on the Titanic famously survived for hours in the icy water despite - or perhaps because of - having got himself blind drunk in the last minutes before the ship went down, which seems to argue against that theory.)
In fact, I think it's the dark that gets to me more. Having the daylight disappear at 4.30 in the afternoon stokes my depression, and it's solace or distraction from that that I seek.