Could there be any sort of rational backing for a phenomenon interpreted as "astrology"?

Of course the star sign woo-woo is complete bullshit, and I'm extremely, extremely skeptical that there's anything to it in general -

But keeping an open mind does require considering the plausibility of there hypothetically being some kind of seasonality-correlated phenomenon that could cause people with close birthdays to be more likely to share certain traits

Like just to give a totally random example, maybe in a certain region there could be an increase in the concentration of a certain pollutant during March - April of every year, so maybe every baby in that region conceived around March - April could get particularly exposed to it at the earliest stage of development, causing babies born around December - January to all be more likely to exhibit some common traits caused by that exposure, or whatever

Is there any possible evidence for anything like that for any given area? I'm very doubtful, but it's interesting to think about I suppose