Microclimates are odd things. When walking through my neighborhood I tend to avoid one particular street, because when I enter it the humidity shoots up and the wind dies down to nothing. It’s like walking through a damp closet. Today I followed it for three blocks and emerged sweating. It’s the lowest point in my immediate neighborhood, but the difference is slight, and in other respects, such as tree cover, it’s indistinguishable from every other street.
Here’s my theory: my neighborhood is traversed by a series of arroyos, but there are none near that street. The arroyos must serve as convectors of air, keeping breezes moving and lowering humidity. That theory may be nonsense — but whatever the cause, the difference between that one street and all the others in the neighborhood is really striking.