Five-Element Divination

I came across a method, and not knowing whether it is accurate, I tried it briefly. It is calculated by Earth, Fire, Wood, Metal, and Water: one begins the day from the month, and the hour from the day. For the ninth day of the seventh month at the Chou hour: the Shen month is Metal, so one counts from Metal — day one is Metal, day two is Water, and so on. Thus one obtains Metal for the day, and Water for the Chou hour; Chou is Earth, and Earth overcomes Water. Divining today’s weather: this is Earth overcoming Heaven, an omen of rain. Yet the weather forecast said cloudy with no rain today; I do not know whether it will verify. I shall wait and observe.

Addendum: that day it did not verify — the air was clear and fine. However, the next day there was a heavy typhoon rain; I do not know whether that still counts as verification.