In effect, poles bend easier when its warmer. As for the return value, I am not sure. I'm going to have to check up on that. The difference is pretty small. Going from Ohio's freezing rain to floridas draining sun, you might vault 5 to 10 pounds higher.
Humidity is also a factor.
But hey, if you don't have your head together, and are not mentaly there, it doesn't matter what stick you use. I use an extra shirt and rub down along the sailpiece. This little bit of friction does warm the pole up, tempriture wise. The only reason I would do that is to keep it from breaking. Cold or rigid poles will break.