Here in the South we have recently experienced temps close to zero degrees F.
Kentucky has been as much as 20 below in the past weeks, plus getting slammed with a foot of snow. I cancelled my order that was due during that time and reordered for mid-April delivery, but considering we're due another 6-10 inches tonight and dropping back to the teens, I'm starting to wonder about that lol!
It's not only the cold that's a problem with USPS shipping, it's the possibility of delays along the way due to road conditions. It's just not worth it to me.