Mine are outside right now in grow out pen inside the run. They are two weeks old, it is about 60 degrees outside. I check on them every hour or so to make sure not to cold then bring them in at night. They will be permentantly moved there this weekend once I get a heat lamp with an extension cord for night time.
Forgot to mention high of 80 today.
do yourself and your chicks a favor. Make sure to attach that heat lamp at least 3 ways, clamp it, attach a chain to it so if the clamp comes loose it will swing and not fall and break, and then put a couple of screws or nails or fence staples around the clamp itself to hold. We don't want a free falling heat lamp to start a fire. Very well documented that they can start a coop fire