Other Spanish newspapers reported the extreme temperature as taken in the sun [2], and also included the temperature in the shade with a more reasonable value.
1: https://repositorio.aemet.es/handle/20.500.11765/6290
2: http://hemeroteca.lavanguardia.com/preview/1935/06/23/pagina...
Also what's your evidence that this is fraud and not just a mistake?
Also, oddly enough, wikipedia doesn't know anything about a 1935 heat record: https://en.wikipedia.org/wiki/List_of_extreme_temperatures_i...
Do scientists sometimes post fraudulent results and/or claims? Sure. And they also get busted by other scientists.
Is this a frequently occurring thing in the grand scheme? Absolutely not.
Is probably the single most studied phenomena (climate change) to ever be under scientific scrutiny since humans became humans actually just widespread fraud and conspiracy? Not a chance.
Are you suggesting a massive world wide conspiracy based on that tiny single article?