Explanation:

Statement 1 is correct. The reason for average high temperature and the apparent absence of winter in the trade wind/hot deserts is the intense insolation, clear and cloudless sky, dry air (low humidity) and a rapid rate of evaporation. (Though the diurnal range of temperature is great)
Statement 2 is correct. Trade wind deserts or the hot deserts lie astride the Horse latitude or the subtropical high-pressure belts where the air is descending. This descending air hinders the formation of any clouds therefore making any sort of precipitation rare. Aridity is the most outstanding feature of desert type of climate.