Question about temps when shipping?

[coldbloodaddict]

I understand temps at all locations need to be acceptable.
Maybe a scenario would be easier for me to understand i guess.

I live just outside of Phoenix so it gets rather hot here. So say it is going to be in the 90's here the evening I'm shipping and the package is going to somewhere that is typically cooler, lets say Colorado or Wyoming. The morning temps would probably be in the 60's. I'm pretty sure the package would go from Phoenix to Tennesse then to Colorado for delivery. And Tennesse overnight would probably be similar to Colorado temp wise. So would you use a cold pack because of the temps here in Phoenix or ship without heat or cold because of the temps in Tennesse and Colorado?

In that particular example you wouldn't need a heat or cold pack...