The National capital had a gloomy weather as the fog returned after four days, and the maximum temperature was recorded at 17 degree celsius, a drop of four notches.
The minimum was recorded at 7.7 degree Celsius.
The fog also affected the schedule of about 50 flights, according to airport sources.
However, the meteorological department on Sunday forecasted a clear sky with mist in the morning for tomorrow.
In Uttar Pradesh, severe cold wave claimed seven more lives pushing the death toll this winter to 69.
Two people died in Barabanki district and one each in Gonda, Deoria, Ballia, Banda, and Hamirpur districts.
Maximum temperature continued to be below normal by 6 to 11 degree celsius in parts of the state and the lowest minimum temperature was 0.7 degress celsius at Lucknow airport.
Normal life in most parts of Punjab and Haryana was crippled due to the fog, which threw rail and road traffic out of gear. However, minimum temperature in the region rose due to cloudy sky.
While most of the flights from Chandigarh airport were cancelled or re-scheduled, several trains criss-crossing the region were running hours behind the schedule due to low visibility.
Hisar was the coldest place in the plains of Punjab and Haryana with a low of 2.2 degree celsius, four notches below normal.
Mercury plummeted in northern parts of Rajasthan with Shri Ganganagar freezing at a low of 0.6 degree celsius, 4 degrees below normal.
Himachal Pradesh remained under the grip of cold wave as night temperatures dropped by one to three notches.