I recently did the Istanbul, Troy and Ephesus trip. Istanbul weather was similar to that we have over here so I would take some warm clothing as well as a jacket and an umbrella just in case it rains. I went on 12 October and we were very lucky with the weather. It remained dry and we also had some sunshine though a light jacket was required. You will love Istanbul. There is so much to see. I would like to do the Istanbul City Break sometime in the future.

Regards

Jaya