What causes winter rainfall in North India?

Winter rainfall in North India is mainly caused by Western Disturbances. These are extra-tropical cyclones that originate over the Mediterranean region and move eastward towards the Indian subcontinent. During the winter months, usually from December to February, Western Disturbances bring moisture-laden winds to North India. When these systems interact with the Himalayan region, they cause rainfall in the plains and snowfall in higher altitudes. This winter rain is important for rabi crops like wheat and barley. Western Disturbances also influence temperature patterns, often leading to cold waves and fog in northern India.