Well, not too hard, my summer carry rig is the same as my spring, fall, and winter rig:
Galco horsehide pocket holster, model PH 158.
It is generous enough in size that it will accept a Colt "D" frame, such as the Agent, Cobra, or Detective Special. Here shown with a S&W 640-1 with the Eagle "Secret Service" stocks in rosewood. This is a little heavy for pocket carry, and I usually carry the S&W 340 PD.
Best Regards, Les