I think there's only about 5 days a year when the weather is perfect for riding in this country (for me that is).
But I absolutely hate the ice and snow with a passion. OK you can wrap up warm if it's cold but if you go out on an icy road you risk coming off and that could ruin the whole season, as has been demonstrated by others on here. So it's turbo and more gym training than you would normally do given a choice, and that takes more willpower and motivation than I've got these days.