If you are talking about weather, in northeast Florida with the weather we've been having they could have been out there for a couple of weeks. You have no worries whatsoever about weather as long as you keep them safe from rain and strong winds.
If you are talking about integrating them, turning them loose with the older ones, we need to talk. There are different ways to go about that, to a large part depending on how much room you have and what it looks like. We can give you some generic suggestions but I'd have to know what you have to work with before I can give you specific suggestions as to what might work in your specific situation. But as long as they are locked up safe from the older ones they are fine.
I see I'm a day late to this, what did you do and how did it go.