well I tend to ride more in the winter than in the summer. Mind you that may be because the "winter" months are dry and with temps of about 20C during the day. Summer here is tropical storms, 35-40C and often higher and humidity high enough for dehydration sitting on my ass in a hammock.
But then I live in NE Thailand.
I used to live in England when I was young and regularly rode in the winter there, with the right clothing, but i tended to avoid the snow.