The word(s) "rain" appears 104 time(s) in 88 verse(s) in Quran in Mohsin Khan translation.

(41) O mankind! If you are in doubt about the Resurrection, then verily We have created you (i.e. Adam) from dust, then from a Nutfah (mixed drops of male and female sexual discharge i.e. the offspring of Adam), then from a clot (a piece of thick coagulated blood) then from a little lump of flesh - some formed and some unformed (as in the case of miscarriage) - that We may make (it) clear to you (i.e. to show you Our Power and Ability to do what We will). And We cause whom We will to remain in the wombs for an appointed term, then We bring you out as infants, then (give you growth) that you may reach your age of full strength. And among you there is he who dies (young), and among you there is he who is brought back to the miserable old age, so that he knows nothing after having known. And you see the earth barren, but when We send down water (rain) on it, it is stirred (to life), and it swells and puts forth every lovely kind (of growth).

(42) See you not that Allah sends down water (rain) from the sky, and then the earth becomes green? Verily, Allah is the Most Kind and Courteous, Well-Acquainted with all things.

(43) And We sent down from the sky water (rain) in (due) measure, and We gave it lodging in the earth, and verily, We are Able to take it away.

(44) See you not that Allah drives the clouds gently, then joins them together, then makes them into a heap of layers, and you see the rain comes forth from between them; and He sends down from the sky hail (like) mountains, (or there are in the heaven mountains of hail from where He sends down hail), and strikes therewith whom He wills, and averts it from whom He wills. The vivid flash of its (clouds) lightning nearly blinds the sight. [Tafsir At-Tabari].

(45) And as for women past child-bearing who do not expect wed-lock, it is no sin on them if they discard their (outer) clothing in such a way as not to show their adornment. But to refrain (i.e. not to discard their outer clothing) is better for them. And Allah is All-Hearer, All-Knower.

(46) And indeed they have passed by the town [of Prophet Lut (Lot)] on which was rained the evil rain. Did they (disbelievers) not then see it (with their own eyes)? Nay! But they used not to expect any resurrection.

(47) And it is He Who sends the winds as heralds of glad tidings, going before His Mercy (rain); and We send down pure water from the sky.

(48) And indeed We have distributed it (rain or water) amongst them in order that they may remember (the Grace of Allah,) but most men (refuse to accept the Truth or Faith and) accept nothing but disbelief or ingratitude.

(49) And We rained on them a rain (of torment). And how evil was the rain of those who had been warned!

(50) And We rained down on them a rain (of stones). So evil was the rain of those who were warned.