What to wear in Barcelona in the Fall *This site contains affiliate links, which means I receive a commission when you buy. See my full disclosure. Fall can be a tricky season when it comes to knowing what to wear in Barcelona. While autumn officially starts on September 22, it’s still shorts-and-tank-tops season well until early October. The good thing is that the weather’s pretty comfortable and  you don’t have to pack heavily. Read on to know what ot wear in…