Ladakh is a high-altitude cold desert in the rain shadows of the Himalayas with 300 days of sunshine and only 100 millimetres of precipitation annually. Even though it hardly rains in Ladakh, storm and localized heavy downpour can cause flash floods and mudslides. In Leh, at 3,500 metres altitude, the average temperature reaches 25°C during the day in summer while it dips to -15°C at night in winter. It can be significantly colder at higher altitude where night-time temperatures can drop below zero even in summer. Always take warm clothing and protect yourself from the strong sun when travelling in Ladakh.