I'm going to say we have to get air conditioning but the very least they could try to get us out a little earlier and give us a lighter dispatch on these hot days
I will never say never about the A/C, but it would not help much.. On short hops between stops, the cool air blowing on you would feel good, but it really wouldn’t cool you down, It would do nothing to cool the cab, let alone cargo area, unless there is a significant drive to the next stop.
What it would do is temp drivers to keep the package car running while delivering, or temp them to sit for a few minutes at the stop with the package car still running to feel the effects of the A/C.
Personally, walking into a building with A/C felt good for about a minute. But any longer, I would cool down a little bit and then die all over again when I walked back outside.
I would rather just stay in the heat, since my body was acclimated to it, except for lunch. Sit somewhere and cool off for awhile.