Question: In *Asterix and the Magic Carpet*, [Cacofonix's](https://www.asterix.com/en/portfolio/cacofonix/) singing produces rain. (Previously, this had never happened.)

**Why is it that when Cacofonix sings, it rains in #28 (*Magic Carpet*, 1987), but not in Books #1-27 (1961-83)?** (Others may disagree, but I find this problematic, puzzling, and in need of explanation.)

(This effect also continues in the next book *Asterix and the Secret Weapon*.)

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Four of the five current answers simply quote from Wikipedia's (unsourced) assertion that there is a French saying that when one sings poorly, it rains.

This could very well be an explanation. But absent either in-universe (i.e. within the comic books, perhaps cleared up in later books) or out-of-universe (e.g. interviews with Uderzo) evidence, this is just speculation. Moreover, it is unsatisfying because it fails to address my above question (in bold).

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Edit: In case it isn't clear, I am not disputing the existence of such a French saying. I am disputing that the existence of such a French saying is a satisfactory explanation to my question. In particular, it fails to explain why Cacofonix's singing had not previously produced rain in the previous 27 books.

Answer: 
According to [the Wikipedia section on Cacofonix](https://en.wikipedia.org/wiki/List_of_Asterix_characters#Cacofonix):

> 
> In later albums his music is so spectacularly horrible that it actually starts thunderstorms (even indoors), because of an old French saying that bad singing causes rain.
> 
> 
> 

A French person reading the comics would automatically get the reference, and thus it isn't stated.
In France we have this saying that if you sing badly it will produce rain. More precisely if you sing out of key, or pitchy, then you'll make it rain. "Cacophonix" means "cacophonie" which is French for "cacophony": harsh discordant mixture of sounds. Thus triggering the rain.