The climate of the UAE generally is very hot and sunny during the day but at night it becomes very cold. The hottest months are July and August, when average maximum temperatures reach above on the coastal plain. In the Western Hajar Mountains, temperatures are considerably cooler, a result of increased altitude. Average minimum temperatures in January and February are between . During the late summer months, a humid southeastern wind known as the sharqi makes the coastal region especially unpleasant. The average annual rainfall in the coastal area is less than , but in some mountainous areas annual rainfall often reaches . Rain in the coastal region falls in short, torrential bursts during the summer months, sometimes resulting in floods in ordinarily dry wadi beds. The region is prone to occasional, violent dust storm, which can severely reduce visibility. The Jebel Jais mountain cluster in Ras Al Khaimah has experienced snow only four times (2004, 2009, 2017 and 2020