Cairo and the Nile valley stage the Giza pyramids and Sphinx, the Egyptian Museum's Tutankhamun collection, Luxor's Karnak Temple and the Valley of the Kings, and Aswan's Philae Temple on the Nile above the High Dam.
Cool dry season with Luxor and Aswan walking pleasant, Cairo at 22°C, Abu Simbel sun alignment at the inner sanctuary on October 22 and February 22 each year.
Peak season with Nile cruises between Luxor and Aswan running fully booked, the Christmas through New Year window at peak demand, and pyramids accessible without summer heat.
Hits 42°C in Luxor with the Valley of the Kings punishing by 10am, but Cairo air-conditioned museums and Nile cruises with pool decks stay viable, and Ramadan affects opening hours.
Khamsin desert wind blows hot sand from the Sahara across Cairo on some days, but Sham el-Nessim Coptic spring holiday brings family picnics, and shoulder season rates apply.