Clouds trap some of the outgoing infrared radiation and radiate it back downward, warming the ground. Another reason is calm winds, which allow formation of mist and fog, Srivastava said.
There hasn't been much snowfall in the hills, so cold winds from that region are yet to start affecting Delhi's weather, he added.
The month of October was the coolest in 58 years in the national capital, according to IMD.
The mean minimum temperature in October this year was 17.2 degrees Celsius, the lowest since 1962, when it was 16.9 degrees Celsius, it said.
Normally, Delhi records a mean minimum temperature of 19.1 degrees Celsius in October. The city recorded a mean minimum temperature of 17.5 degrees Celsius in October 2007, according to IMD.
On Thursday, Delhi recorded a minimum temperature of 12.5 degrees Celsius -- the lowest in October in 26 years.
The last time Delhi recorded such a low temperature in October was in 1994. The national capital had recorded a minimum of 12.3 degrees Celsius on October 31, 1994, according to IMD data.
The city recorded the all-time lowest temperature (9.4 degrees Celsius) on October 31, 1937, Srivastava said.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)
Business Standard has always strived hard to provide up-to-date information and commentary on developments that are of interest to you and have wider political and economic implications for the country and the world. Your encouragement and constant feedback on how to improve our offering have only made our resolve and commitment to these ideals stronger. Even during these difficult times arising out of Covid-19, we continue to remain committed to keeping you informed and updated with credible news, authoritative views and incisive commentary on topical issues of relevance.
We, however, have a request.
As we battle the economic impact of the pandemic, we need your support even more, so that we can continue to offer you more quality content. Our subscription model has seen an encouraging response from many of you, who have subscribed to our online content. More subscription to our online content can only help us achieve the goals of offering you even better and more relevant content. We believe in free, fair and credible journalism. Your support through more subscriptions can help us practise the journalism to which we are committed.
Support quality journalism and subscribe to Business Standard.