There is no wrong time to hatch chicks. That said, from a practical standpoint, heated waterbowls, extra heat lamps... North of 84 is colder than south... just kidding ;)
Getting them to 3-4 weeks old is the only issue. I raised them in the basement, but only until I got my trailer/Brooder set up. I took a utility trailer (learned it here BTW), boxed in 3 sides with a door, wired the top with fencing, tarped it, added 2 heat lamps and 2 5 gallon bucket waterers with nipples ( I raise more than 100 at a time), put in the wood shavings and voila! All set to raise them. If it is really cold they stay in the brooder til 4 even 5 weeks. If it is really really cold, the brooder comes into the barn or garage.