Cigars are something I'm dabbling in a little more than I used to. When I smoke them in the cold, something about the wrapper warping and even splitting happens. Being a noob in that department, I have no idea if it was me or not. *shrug* Tasted good, though!
Smoking meers in the cold is a contentious subject. I recently had a brand-new meer crack the other evening, and so there's that. Interestingly, I had a conversation with a brother that had the same thing happen in 90'F weather. So, it's one of those things. My other meer I've been smoking in the cold for months now, and it's actually colored BETTER in that time. *shrug* It's a risk we assume, and sometimes is out of our control as they're natural products that can contain hidden, natural flaws. Cobs and briar can subject to this as well.
The flexibility and forgiveness of briar and cob alike seem to be anything-goes kind of pipes for any condition. Cobs tend to suck up moisture, both ambient and via smoke, and dry areas like where I live are very favorable for cobs to that end. Briar, then, becomes a pretty universal choice, because they have a pleasant taste to the smoke and there's been no weather condition (other than wind) that causes them ill performance. Wind just...blows...no matter what pipe you take outside, though.
8)