Simpe question really. We ar going back to Barcelona in second week in September, hoping to do.see some of things we didn't on our last trip. One of these is a trip out to the Monastery in Montserrat. I just wonder if there will be much of a tempreature difference beteween the mountain and downtown Barcelona and whether warm clothing is advised? I gues it would be best to try and check the local weather when we are there?