The amount of rain that falls on the earth is always the same. It is estimated, that in one second, 16 million tonnes of water evaporate from the earth. This number is equal to the amount of water that drops on the earth in one second. This means that water continuously circulates in a balanced cycle according to a "measure".

“He sends down water (rain) from the sky in due measure. Then we revive a dead land therewith, and even so You will be brought forth (from the dead)” (Quran 43:11 Translated meaning)

Another measure related with rain is about its falling speed. The minimum altitude of rain clouds is 1,200 meters. When dropped from this height, an object having the same weight and size as a rain drop, would continuously accelerate and fall on the ground with a speed of 558 km/h. Certainly, any object that hits the ground with that speed would cause great damage. If rain happened to fall in the same way, all harvested lands would be destroyed, residential areas, houses, and cars would be damaged, and people would not be able to walk around without taking extra precautions. What is more, these calculations are made just for clouds at a height of 1,200 meters; there are also rain clouds at altitudes of 10,000 meters. A rain drop falling from such a height could normally reach a very destructive speed. But this is not how it works; no matter from what height they fall, the average speed of rain drops is only 8-10 km/h when they reach the ground. The reason for this is the special form they take. This special form increases the friction effect of the atmosphere and prevents acceleration when the rain drops reach a certain speed "limit". (Today parachutes are designed by using this technique.)

This is not all about the "measures" of rain. For instance, in the atmospheric layers where it starts to rain, the temperature may fall as low as 400 C below zero. Despite this, rain drops never turn into ice particles. (This would certainly mean a fatal threat to the living things on the earth.) The reason is that the water in the atmosphere is pure water. As is well-known, pure water hardly freezes even at very low temperatures.

How rain forms remained a great mystery for people for a long time. Only after weather radar was invented, was it possible to discover the stages by which rain is formed. The formation of rain takes place in three stages. First, the "raw material" of rain rises up into the air. Later clouds are formed. Finally, rain drops appear. These stages are clearly defined in the Quran centuries ago where precise information is given about the formation of rain:

“Allah is He who sends the winds, so they raise clouds, and spread them along the sky as He wills, and Then break them into fragments, until You see rain drops come forth from their midst! Then when He has made them fall on whom of his slaves as He will, Lo! they rejoice!” (Quran 30:48 Translated meaning)

Now, let us look at the three stages mentioned in the verse;

1ST STAGE "Allah is He who sends the winds...": Countless air bubbles formed by the foaming in the oceans continuously burst and cause water particles to be ejected towards the sky. These particles, which are rich in salt, are then carried away by winds and move upwards in the atmosphere. These particles, which are called aerosols, form clouds by collecting around themselves the water vapour, which again ascends from the seas, as tiny drops by a mechanism called "water trap".

2ND STAGE " ... so they raise clouds, and spread them along the sky as He wills, and Then break them into fragments...": The clouds form from the water vapour that condenses around the salt crystals or the dust particles in the air. Because the water drops in these are very small (with a diameter between 0.01 and 0.02 mm), the clouds are suspended in the air and they spread in the sky. Thus the sky is covered with clouds.

3RD STAGE "... until You see rain drops come forth from their midst.": Water particles that surround salt crystals and dust particles thicken and form rain drops. So, the drops, which become heavier than air, depart from the clouds, and start to fall on the ground as rain.

Every stage in the formation of rain is told in the verses of the Quran! Furthermore, these stages are explained in the right sequence. Just as with many other natural phenomena in the world, it is again the Quran that provides the most correct explanation about this phenomenon as well, and more, that has announced these facts to people centuries before they were discovered by science.

Say: "It (this Quran) has been sent down by Him (Allah) (the real Lord of the heavens and earth) who knows the secret of the heavens and the earth. Truly, He is Oft-Forgiving, Most Merciful." (Quran 25:6 Translated meaning)

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