Why does shifting the DS clock and catching a Pokemon remove overworld weather in Black/White?

I found out this trick to remove weather:You save the game in the grass where you can catch a Pokémon.You set the clock to one month later.After that you load the game and then you catch a Pokémon in the area you saved in.And…Presto! The weather is gone!This trick works with all the weather you can’t use sweet scent with, and it is not permanent and the weather comes back once you capture a Pokémon or leave the area. After that you must do it again.I use this trick so I can sweet scent. I would like to know how this trick works. I would like to know so because I wouldn’t like to do something I don’t understand. And please make the explanation as simple as possible.

Thanks! I appreciate your help.

Pleaselog inorregisterto add a comment.

In Generation V, it is possible to temporarily remove overworld weather by saving the game, setting the DS’s clock to one month later (to change the season), loading the save file, and catching a Pokémon without leaving the area. This works even if the area always has the same weather regardless of the season.

Source

This is a documented “feature” of Pokemon B/W games. However, no one has determined this to be intentional. Bulbapedia lists it in it’sGen V glitch list,so it’s safe to assume its a glitch. It also doesn’t occur in the game’s sequels, which further backs that argument.

Hope I could help!