The climate of St. Catherine is purely arid with annual rainfall of around 60 mm. Precipitation could peak when moist air uplifted, causing arographic precipitation or snow that may mount to 300 mm per year. Rainfall sporadically falls between October and May. Mean temperatures reach up to 36° in August, and decrease to -7.8° in February inasmuch as the climate of St. Catherine resembles the Saharan-Mediterranian one. Nearby the Red Sea coast, the climate is quite different as temperatures range from 13° to 23° C in the winter season; 20°-30° ; 25°-35° C in the spring season, and 20°-30° C in the summer season. In addition, precipitation does not surpass 20 mm per year, as well as the average moderate humidity is 60% in the Southern tip.