Is the mail outside on trucks during the night, in the very cold and hot weather?

Trucks are normally loaded and set for the driver at least five or six hours setting outside

Yes. And if not it would be in a warehouse with little to no heat/ac

All delivery trucks are parked inside from when drivers return in the evening to when they leave again in the morning. It is not air conditioned but is heated very well.

They do not keep packages in climate controlled settings. Furthermore even if you do pack to account for this there is NO guarantee it will arrive as intended given their horrific logistical coordination between customer service and local dispatchers

Thank you!