How do Afghanistan’s mountains affect its climate?

Afghanistan’s mountainous terrain significantly dictates its climate through elevation and the blocking of air masses.

• Elevation and Temperature: Local climate variations are largely driven by differences in elevation. While the country generally experiences a semiarid steppe climate with hot summers and cold winters, high mountain areas are significantly colder, with January temperatures often dropping to 5 °F (−15 °C) or lower.1
• Precipitation Patterns: Mountains influence moisture distribution. In the northeast, the highlands experience a subarctic climate with dry, cold winters. Conversely, mountain ranges along the border with Pakistan act as a barrier that isolates the interior from moisture-laden winds originating from the Indian Ocean, contributing to the country's overall aridity.12
• Regional Influences: While the interior is shielded, mountainous areas on the Pakistani border are influenced by Indian monsoons, which bring humidity and rain between July and September. Additionally, the Hindu Kush range creates significant precipitation extremes, with the Sālang Pass recording some of the highest annual rainfall in the country compared to the arid western regions.1