The Karakoram is subject to the Southwest monsoon that draws its moisture from the Arabian Sea from mid-June until the end of August. During this time the occasional storm will move north up the Indus Valley as far as the Karakorm, although the regularity and intensity of the rains is far less apparent than in the nearby regions of the Indian Himalayas. Localized storms on the higher elevations of the Karakorm are a further important consideration. Records of three or four days of intense bad weather followed by similar fine periods seem to characterize the region and even in September, trekking groups are well advised to prepare for at least one bad spell of weather during the expedition.
*Subject to weather.