When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Cork is roughly greater than that of Basra. You can assume this to be the case over the next 27 days.
Expect the weather to be around 43 °C on average in September. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Basra is generally hotter than in Cork.