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i believe ben dykes more recent books on mundane astrology touch on this.. i think it is coming out of his interpretation/translations of a few texts including ptolemy's work which covered this topic you are interested in.. good luck finding what you are looking for. i have made the general observation where i live that the weather often changes close to the new or full moons. we get a lot of rain here and if it isn't raining in one part of the moon cycle, it usually always comes in the other part! that is about as much as i know about weather forecasting via astrology - mostly i follow the moon's relationship in it all.