its 50/50.... althought they say it should be done at 105k, there is also the thought that after so many years even without the miles it might be time to replace. If you planning on doing it, then by all means, go ahead. sooner wont hurt anything, but the belt like tires, after so many years could show signs of age ie stretch or even cracks from drying out some. Mine at around 85k after 6 years didnt show any signs of dry rot, but did show that it was stretched.

So, could you wait til after the winter, yeah probably so. Should you wait til after winter? again, its up to you. It should be fine til then, I'm sure others will chime in with their info.