One thing to keep in mind when talking about the native weather for flytraps is that if 10% of plants in a local area are killed by a weather event, no one is likely to notice. If I lose 1 of my my flytraps, particularly if it is a cultivar, that is going to be a big deal. Plus, we do not provide the same conditions as wild flytraps, even if we were living in the Green Swamp. The soil, drainage, companion plants, and terrain will all be different. I've seen flytraps growing in areas with grasses where the grass will grow up and shield it in the fall. In certainly not going to let that happen in my pots.
That being said, flytraps are hardy and can handle many and varying conditions and weather events.