The best time to go to Al Kawm Al Akhḑar is during the cooler, drier months, typically from October to April.
During these months, the weather is much more pleasant, with daytime temperatures usually ranging from 20 to 30 degrees Celsius. This is ideal for exploring the historical sites and outdoor attractions without the intense heat of summer. You'll find it more comfortable to visit places like the Tuna el-Gebel necropolis or the ancient city of Akhenaten (Amarna).
For those who enjoy comfortable exploration and want to avoid large crowds, late autumn (October-November) and early spring (March-April) are particularly good.