Summer, roughly June through August, brings the most intense heat, particularly in Upper Egypt around Luxor and Aswan, where daytime temperatures regularly exceed what's comfortable for extended outdoor walking at open-air sites.
| City | January avg high | July avg high |
|---|---|---|
| Cairo | 19.0°C | 34.8°C |
| Luxor | 23.0°C | 41.4°C |
| Aswan | 22.9°C | 41.4°C |
| Hurghada | 21.7°C | 35.0°C |
| Sharm El-Sheikh | 21.9°C | 37.9°C |
| Alexandria | 18.3°C | 29.9°C |
(Monthly averages per intergovernmental climate data.) Upper Egypt — Luxor and Aswan — runs consistently hotter than Cairo, Alexandria, or the Red Sea coast, which stay comparatively moderate even in summer thanks to the sea and Mediterranean influence.
Traveling in summer isn't impossible
Ships and hotels are air-conditioned throughout, and mornings are more bearable, but summer travel means planning around the heat more deliberately — earlier excursions, more shade breaks, and accepting a slower midday pace than in the cooler months. See When Is the Best Time to Take a Nile Cruise? for how this maps onto cruise scheduling specifically.