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Why does the Indus River flood most often from July to September?

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Physical map showing the Indus River basin and its drainage network across parts of Pakistan, India, China, and Afghanistan. The map details river courses, tributaries, canals, dams, irrigated and marsh areas, sand regions, and elevation changes with shaded relief. International, disputed, and control boundaries are marked, and a small locator map in the corner shows the basin's position within South Asia. — Indus River The Indus River basin and its drainage network.

The Indus River experiences flooding most often from July to September primarily due to the monsoon rains that occur during this period.12

While the river system is largely snow-fed by the melting glaciers and snows of the Karakoram, Hindu Kush, and Himalayan ranges, the additional volume provided by these seasonal monsoon rains significantly increases the river's discharge. This influx of water frequently leads to the inundation of active floodplains, which are locally known as the "summer bed of rivers" because they are flooded almost every rainy season.1234