This was still confusing to me because I'm dumb. So I researched more and was basically met with the same information from a meteorologist in Memphis.
It was getting obvious that this thing "PoPs" is the key here.
But I still needed more clarity because, tbh, I'm extra confused what the hell is going on here. So then I found this simple explanation from a meteorologist in Cleveland, and she used a graph, which is cool.
Okay so there it is, the percent regarding the chance of rain is not what you really think. This probably will not affect your life in any way, but NOW YOU KNOW. Bye.