I figured you meant Fahrenheit. Still -2 is October temperatures here.
If you start in September, your birds should be laying by spring. Wouldn't that be beneficial?
What are the pros and cons about raising in fall? Is it just the feed costs? Does it affect their thriftiness at all?
Wow. 24...
Do you raise chicks through winter?
28 degrees. That is warm :P We had our first clutch in February and the temps were plummeting to -20 at night. Did not lose a single chick.