I think I already said before about Florence and St Petersburg having transitional climates is that part of it’s attributable to urban heat island effects which urban centres are hotter than the rest due to absorbing more heat. This gets complicated by proximity to the ocean which complicates things. So only certain areas in Florence and St Petersburg would be Mediterranean and Oceanic respectively.
(Moreso if you adjust isotherm temperatures to below 3 degrees or something.)
Makes sense that the surrounding areas would be considerably cooler as they’re less compactly urbanised. Though due to growing awareness over global warming, many cities and some people are trying to counteract it through gardening. I won’t be so surprised if some people took up gardening for more altruistic causes. Especially if it gets too hot for its own good.