The Quran stressing on the link between winds and clouds: rain

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So, people were not capable of drawing a connection between clouds and rain before the Koran?

*Winds and clouds. The verse stressed on that. Winds were pinpointed as the cause of clouds to rise up. People in the past didn't know that as far as I know.

So people did not feel a wind and see the clouds moving across the sky before the Koran? The Koranic verses do not speak of the formation of clouds. Gods never know more than their creators. The iron  age writers of the Koran were ignorant compared to the average grade schooler today. Allah is more ignorant than a fifth grader today.