Delhi woke up to "dense to very dense fog" on Saturday with the minimum temperature settling at 10.4 degrees Celsius, as per the Meteorological department.
Fog shrouds parts of the national capital leading to low visibility in many areas.
According to India Meteorological Department (IMD), a very dense fog was reported in a few pockets over Punjab and in isolated pockets over West Rajasthan and Odisha
People in Delhi woke up to another foggy morning on Sunday with a thin layer of fog engulfed parts of the national capital, reducing the visibility here, that disrupted traffic movement.
The Central Pollution Control Board (CPCB) reported AQIs of 392 in ITO, 412 in RK Puram and 406 in Chandni Chowk, all in the 'very poor' category.
The air quality continued to remain in the 'very poor' category on Wednesday, with overall AQI (Air Quality Index) standing at 362.
In the plains, the IMD declares a cold wave if the minimum temperature dips to four degrees Celsius. A severe cold wave is when the minimum is 2 degrees Celsius or less.
India Meteorological Department (IMD) in a tweet stated, "Visibility (in meter) recorded 0530 hours IST of January 31: Delhi (Palam and Safdarjung)-1000m."
Delhi remained enveloped in a layer of fog on Friday morning whereas the low visibility hindered the traffic movement in the national capital.
Delhi's overall air quality stands in the 'very poor' category, according to the System of Air Quality & Weather Forecasting & Research (SAFAR).
According to the Indian Meteorological Department (IMD), visibility recorded in Palam at half-past six in the morning was 300 meters.
At least 16 Delhi-bound trains have been reported to be running late. The Delhi Airport, however, said that all flight operations are normal and low visibility procedures are in process.
Delhi witnessed dense fog on Saturday morning that led to poor visibility in several parts of the national capital.
A thick layer of fog engulfed parts of the national capital on Sunday including Rajghat and Punjabi Bagh. According to the India Meteorological Department (IMD), cold wave to severe cold wave conditions are likely to re-establish over Punjab, Haryana, Chandigarh and Delhi, Rajasthan and West Uttar Pradesh from 29th December.
Apart from Delhi, the fog was also witnessed in the National Capital Region including Ghaziabad, Faridabad, Gurugram and Noida. Due to low visibility and ongoing farmers' protest, traffic has slowed down across the capital.
The meteorological department had said that cold day conditions are very likely in isolated parts over Punjab, Haryana and Madhya Pradesh during the next 24 hours and it will improve thereafter.
Amid bone-chilling winter in North India, Delhi NCR recorded a minimum of 8 degrees Celsius on Saturday morning and a sunny day is predicted ahead, the weather department said.