How many days are sunny in the Sahara Desert?

The Sahara desert is globally very sunny and even extremely sunny in the eastern part (desert part of Libya, Egypt and Sudan). The sunshine hours varies from 3,000 hours to 4,000 hours in the desert. The central, hyperarid part of the Sahara records more than 3,500 hours of sunlight annually everywhere. The days are generally cloudless, clear and sunny while the cloudy days (days with no sun) remain very rare in the region but we can't mention accurately the actual sunny days in the desert. The desert sun shines nearly every day and strongly (the sun is usually high in the sky) since the Sahara desert is located in the subtropics, near the tropics.