Do you mean to receive the snake on Friday? It's more risky that way, because a delay would mean the snake has to be in a box over the weekend, as FedEx does not deliver on Saturday. Some shippers will not ship on Thursdays for that reason. Also when your temperatures are at or above 90 degrees, I would definitely be concerned about overheating on a delivery truck. I think the safest way to have a snake shipped when your temperatures are that hot is with FedEx hold at location service. That way your snake is available for you to pick-up the next morning and does not have to ride on a potentially dangerously hot deliery truck.