When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Cardiff is roughly greater than that of Basra. You can assume this to be the case over the next 12 days.
With an average temperature of 43 °C, peak weather can be found in September. As a traveller, expect to see changes in flight prices during that period. The temperatures in Basra are hotter than in Cardiff.