Luck, financial success.
Dream dictionary: Downpour dream meanings
…It means purification of feelings and desires to reach the most sublime form – goodness. To dream of slow, steady raining foretells that the benefit will be great but slow to arrive. If it’s a downpour that has us immobilized it means there will be interference or problems that need to be solved before achieving those benefits. This dream indicates that the greater amount of rain water means a greater benefit….
…To be out in a clear shower of rain, denotes that pleasure will be enjoyed with the zest of youth, and prosperity will come to you. If the rain descends from murky clouds, you will feel alarmed over the graveness of your undertakings. To see and hear rain approaching, and you escape being wet, you will succeed in your plans, and your designs will mature rapidly. To be sitting in the house and see through the window a downpour of rain, denotes that you will possess fortune, and passionate love will be requited. To hear the patter of rain on the roof, denotes a realization of domestic bliss and joy. Fortune will come in a small way. Dreaming that your house is leaking during a rain, if the water is clear, foretells that illicit pleasure will come to you rather unexpectedly | but if filthy or muddy, you may…