Clouds look dark because they are thicker and denser than normal clouds of a day of mild weather. As a cloud gathers more water droplets and ice crystals, it become thicker and allows less light to pass through it.

Stock photo: Clouds look dark because they are thicker and denser than normal clouds of a day of mild weather. As a cloud gathers more water droplets and ice crystals, it become thicker and allows less light to pass through it. was taken by myriani .