RE: warm weather...
Even the first week of Oct. can be pretty warm here in PA. I like to go out early morning with just a set of X-Scent base layers and my ASAT 3D leafy suit. Keeps me from getting too sweaty walking to my stand and setting up my climber. Most mornings I am comfortable if the temperature is 55 or above. But ifthe temp isbelow that then I will drop the base layers in favor of my lightweight Savanna camo.
As for hunting I don't stay on stand later than 10am. By then it's usually warming up to the point where I'm getting too warm and the deer activity has stopped.