In some parts of the world (usually closer to the equator), the four seasons of the temperate climate do not make sense. The weather does not really correspond to winter. spring, summer and fall.
In those areas, it makes more sense to divide the year into the rainy season and the dry season. It is like that in Florida although those terms are not really used. But the rainy season does overlap the summer season (and corresponds roughly to hurricane season).
In many parts of the world, summer causes increased evaporative moisture by the sun being over the ocean for a longer period of time, which increases humidity. As it then crosses a land mass, the super saturated clouds cool just a bit to cause rain.
In California, the clouds are cooler and we don’t get rain, we just get cold fog along the coast.