I grilled this evening.
It's February in Indiana and I stood outside (in a light snow) and cooked steak on the grill. It wasn't so bad. I started wondering what other outdoor activities that are normally reserved for warm weather might be fun in February.
The Slip-N-Slide came to mind. A thin layer of ice might make it even better. It might also be interesting to do some rollerblading over the frozen sidewalks.
It would seem that summer sports translate easily to wintertime but the converse is not true. You can grill outside in February. You can't have a snowball fight in July.