Maximum temperatures ranged from 20.6 degrees Celsius in Haryana's Karnal to 27.4 degrees Celsius in Punjab's Patiala, with Delhi's base weather station, Safdarjung, recording 25.4 degrees, about 5.6 degrees below normal. New Delhi, Oct 29 (PTI) Daytime temperatures dropped sharply across northern India on Thursday, with Delhi registering its coldest October day in four years, as heavy rain lashed the region amid the.