Sorry, please do elaborate on what it is you are talking about, I am all but lost
Explanation:
You can try to think of it as a picture in your head.
Clouds can cover up the sun, which is the natural source for heat everywhere. When the sun is not in sight, or thickly covered by clouds, this limits the suns radiation and heat waves therefore causing less light and heat.
Anong ibig mong sabihin? (Wdym)