NEW DELHI: Moderate fog was on Thursday witnessed over various parts of NCR due to excessive moisture and dip in the temperature.
As a result of the fog, visibility was also reduced.
Such weather conditions are not typical for May which tends to be the hottest month of the year in the city with a mean maximum temperature of 39.5 degrees Celsius.
Weather department officials said high moisture content in the air, calm winds and a significant difference between the daytime and nighttime temperatures create conditions that are favourable for the formation of fog.
According to the IMD, shallow fog is when visibility is between 501 and 1,000 metres.
The Safdarjung Observatory, Delhi’s primary weather station, recorded 30 mm of rainfall in 24 hours ending at 8.30 am on Thursday.