Most breeder ship monday through wednesday to avoid any carrier issues, shipping on a thursday to be delivered on a friday is risky should the package not be delivered it would be held at the facility and put back on a truck until the following monday.
Saturday deliveries are possible but a lot more expensive and you are facing the same problem should the package not be delivered.
Now as far as temps 85 to 90 degrees are in perfect shipping range of course it all depends on the shipper.