when is it too cold to ship?

[RichsBallPythons]

We call 15 degrees our low cut-off. Although, remember that even if you ship hub to hub, the coldest temps the box is exposed to is on the flight at 20,000 feet with no environmental control in the cargo hold. It does get cold on the flight.

This is why Marking boxes of whats inside helps them board the box in a heated area. If not mistaken all FedEx planes have the cargo area that gets to freezing and below, and then a heated area where the pilots are exposed to as well.