Thereby , the solar irradiation is among the highest found on the planet and the annual sunshine duration is estimated between 3,700 h and 4,000 h .
The sky is clear all year and cloudy days are very rare .
The solar irradiation is among the highest found on the planet and the annual sunshine duration is estimated between 3,700 h and 4,000 h .
The sky is clear all year and cloudy days are very rare .