Taking the local weather in El Cairo into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually September and August, with an average temperature of 21°C, while the coldest months are December and January, with an average of 20°C. The rainiest months in El Cairo are May, April, October and June, with each month seeing an average of 627 mm of rainfall.