we compost in winter too. but use raised mesh beds or cylinders to be more exact. they drain well when it rains and snows yet still heats up and decomposes nicely when you have the right ratios of materials. in fact i get some of my best compost in late winter early spring.
The ultimate goal of farming is not the growing of crops, but the cultivation and perfection of human beings. - Masanobu Fukuoka