Luxor has a hot desert climate like the rest of Egypt. Aswan and Luxor have the hottest summer days of any other city in Egypt. Aswan and Luxor have nearly the same climate. Luxor is one of the sunniest and driest cities in the world. Average high temperatures are above 40 °C (104 °F) during summer (June, July, August) During the coldest month of the year, average high temperatures remain above 22 °C (71.6 °F) while average low temperatures remain above 5 °C (41 °F).
The climate of Luxor has precipitation levels lower than even most other places in the Sahara, with less than 1 mm (0.04 in) of average annual precipitation. The desert city is one of the driest ones in the world, and rainfall does not occur every year. The air in Luxor is more humid than Aswan but still very dry. There is an average relative humidity of 39.9%, with a maximum mean of 57% during winter and a minimum mean of 27% during summer.
The climate of Luxor is extremely clear, bright and sunny year-round, in all seasons, with a low seasonal variation, with about some 4,000 hours of annual sunshine, very close of the maximum theoretical sunshine duration.
In addition, Luxor, Minya, Sohag, Qena and Asyut have the widest difference of temperatures between days and nights of any city in Egypt, with almost 16 °C (29 °F) difference.
The hottest temperature recorded was on May 15, 1991 which was 50 °C (122 °F) and the coldest temperature was on February 6, 1989 which was −1 °C (30 °F).