Egypt Weather, climate and geography
The best time to visit most sights, including the pyramids and the Valley of the Kings, or diving in the Red Sea, is from February to April and October to November. During these months the heat reminds you that it's the ‘Land of the Sun', but not too hot to be enjoyable. At this time, the skies and sea are a perfect blue. The downside is that these are the most popular times of the year for visitors.
In April, the hot, dusty khamsin wind blows from the Sahara, making touring of sights potentially troublesome; during an intense sand storm, vision may be reduced to a few meters. During the hot, dry summers (June-August) there’s always the risk of dehydration and heat exhaustion, which might confine visitors indoors during the early afternoon.
Winters (November-February) are usually mild and often overcast, leaving the desert and its ancient monuments looking lacklustre. Rainfall is negligible except on the coast.