The form of the summer suit is similar to that of the cooler months, while the details differ. In the illustration, from a 1933 issue of Esquire, the suit is linen rather than wool and in a lighter gray for the season. The pockets are patched, so the interior of the coat can have minimal lining for coolness. The shoes are a lighter shade of brown to complement the suit. And the hat is straw, rather than felt, again to promote air ciculation.
The look is familiar, but different at the same time.