Citibike wants to connect to the city grid so they don't need to send technicians to every station to swap dead batteries. It's not too much of a stretch to think that, perhaps, the stations could recharge truck batteries, too, at some point. Many fewer residents bike during the winter, let alone during a snow storm, so you could, conceivably, sacrifice a bike space or two or five in December-February (or just when you know snow is coming). Stations are ubiquitous by now: especially in the denser areas, there's one every few blocks.

That's assuming you can deal with safety, theft and other related issues.