Summer, here in humid SE Texas, does not compel me to carry a smaller weapon. Winter does not make me think that I need to carry a larger-bore weapon, though our winters are not usually all that cold. Cooler weather can certainly make it more practical to use some more-comfortable OWB holsters, such as the Milt Sparks 200AW or HSR holsters, that do not hold the weapon as tightly against the body