In my life i have ordered and shipped eggs either from or to most areas East of the Mississippi River and some areas to the West. The biggest problem is the physical insults that hatching eggs are exposed to during shipping, not necessarily the weather. In fact warm temps in my experience may be worse than cold. If there is any way that you can do so, pick up the eggs or arrange for someone to pick them up for you. Also, I don't think that the hens and roosters are fully recovered yet from the rigors of the molt.
Will eggs hatch in spite of these things? Sure but you are only hurting your chances if everything is not perfect or nearly so because shipped eggs start at a disadvantage.
Good luck.