-In Madrid the local saying is that the climate is "9 months of winter and 3 months of hell" which describes the freezing winters and scorching summers. In Seville, Cordoba and Granada temperatures reached 50ºC (over 120ºF) in the summer of 2003
- http://gospain.about.com/od/spanishclimate/qt/September.htm
Summer in Madrid can be uncomfortably warm and if the hot season outstays its welcome, September might still be a little unpleasant. However, most likely Madrid will be hot but bearable this month. The average maximum temperature in Madrid in September is 82°F/28°C and the average minimum temperature is 55°F/13°C. Summer in September in Barcelona and beaches will still be populated by northern Europeans looking for a tan. However, Barcelona doesn't tend to get quite as hot as Madrid and the temperatures here won't as fierce as they tend to be in the capital. The average maximum temperature in Barcelona in September is 79°F/26°C and the average minimum temperature is 63°F/17°C. Andalusia is Spain's sunniest region and you'd be unlucky to not get good weather all over the region for the entire month. Seville (like Madrid) may still be unbearably hot, but the coastal cities will be more temperate. The average maximum temperature in Malaga in September is 82°F/28°C and the average minimum temperature is 64°F/18°C.
-In Madrid the local saying is that the climate is "9 months of winter and 3 months of hell" which describes the freezing winters and scorching summers. In Seville, Cordoba and Granada temperatures reached 50ºC (over 120ºF) in the summer of 2003
- http://gospain.about.com/od/spanishclimate/qt/September.htm