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I lived in California a while back, and have experienced a few instances where large companies headquartered e.g. in Minneapolis, were selling products in all their stores nationwide as if everybody in US had the same weather, seasons and body size.
In particular, some stores (maybe Target - I don't remember) that sell garden tables did not have any product available in late February, although late February in much of California is a great time to remodel your garden.
Also, some store that sell clothes had a large number of articles for over-sized people in a town where most people are very thin.
Is this still the case? That sounds to me like a very simple problem to solve: sell garden tables in February in Los Angeles, but not in Minneapolis. Have a very small inventory of over-sized pants and shirts in Los Angeles or New York, and the other way around in Detroit or Des Moines.