If most of the interests you hold dear take place in summer then winter can be a bleak time.So for me I do craft work in winter..and read more.
I also have a flip over muti photo frame of favourite places we visit.I buy postcard and trim them to fit my flip frame.In the knowledge that when the weather warms up these haunts will be revisited.
If work provided stimulas in friendships that too can be a loss.
but where there is a space it can be filled if we look out for other ventures