Well, weather now is quite hot it is 38 - 39
but, in September weather became better around 30
Also in September you can enjoy Ramadan as you can have fun time and good rates in hotels specially in coast.
You can contact me any time to arrange you any tour here in Cairo or any where else here in Egypt.
You are also free to ask me for any question you can't find its answer about Egypt, life in it, places to visit, prices, ...