The dense fog engulfed Amritsar, Ludhiana, Patiala, Hisar, Karnal and Ambala reducing visibility to up to 150 meters.
Foggy weather also affected the road, rail and air traffic in the region.
Shatabdi train between Delhi and Kalka via Chandigarh was running behind schedule by over one hour, while Himalyan Queen express between Delhi and Kalka and train between Bhiwani and Kalka were running late by over one hour each.
A flight between Delhi and Chandigarh was cancelled, while two flights between Delhi -Chandigarh and Bangalore-Chandigarh were also behind schedule by over two hours.
Narnaul recorded the second lowest mercury at 4 deg C, one degree below normal.
Ambala and Hisar experienced cold conditions at 4.5 deg C and 5.2 deg C, two notches below normal each, while Bhiwani had a low of 5.8 deg C.
In Punjab, Amritsar recorded minimum at 5 deg C, while Patiala and Ludhiana had low of 4.3 deg C and 5.8 deg C, down by up to three degrees below normal.
