You mean the ten years I lived there? Yeah. Musta blinked.
You do realise that the average temperatures that you googled in order to appear like you have the slightest fucking clue what you are talking about include nighttime temps too, right? Meanwhile, this is the shit that actually goes down in Budapest during July and August:
http://news.bbc.co.uk/2/hi/europe/6914490.stm
And when you compound the already high temperatures with the fact that the city has precious little green space and is basically one big concrete and stone oven reflecting that heat right back atcha, yeah. It gets hot. Summertime? My fucking thermometer was reading in the 40s more often than not. Please though. Tell me more.