Do cats have kittens in the winter?

No, it is best you keep the kitten inside until it is old enough to survive the winter.

It depends on what you call winter. If it is a New England winter, definitely no kittens will survive outside. No cats should be left outside in the winter. If it's too cold for you then it is too cold for a cat or a dog. Other animals that do live outdoors year round have coping means, They have extremely thick fur, they can reduce their heart rate, they can have stored blubber, they hiberate, they dig deep holes below the frost line, or they find a some shelter out of the worst of the weather. But domestic pets DO NOT belong outdoors in the winter, they haven't adapted to freezing temps., they don't know how to hunt / gather food and the wild animals in survival mode & are territorial and will likely protect their food area by fighting your poor pampered pet to the death. There are organizations out there that will take in stray/feral cats. google feral cat organizations & your town / state, or call your local SPCA for advice. But please don't allow domestic pets to suffer.