Hi Lynn,Thanks for your message.I would say that you have picked a great time to go in September. It will be monsoon season however, depending on which parts of india you will be in, the temperatures range between 15-37 degrees!October-February is is cool seasonMarch-June is hot season (too hot!)June-August is cyclone seasonI would pack lighweight clothes for the daytime as it looks like its going to be nice and warm, but pack a couple of cover-ups for the evenings as it tends to get very cool.And dont forget your waterproofs and umbrella!I hope this helps,Warm wishesCheryl, your editor