The frigid air barrelling through parts of north India plummeted temperatures to the season's lowest in several places Saturday, including Delhi where the mercury hit a low of 2.4 degrees Celsius, as dense fog reduced visibility and delayed air, rail and road traffic. The cold wave was not expected to relent until the New Year.

from Times of India https://timesofindia.indiatimes.com/india/cold-wave-tightens-grip-in-north-india-hits-rail-and-air-traffic-no-respite-till-new-year/articleshow/73010757.cms