Amritsar in Punjab was the coldest in the region with the minimum temperature being recorded at a freezing zero degrees on Monday.
Cold wave and dense fog continued to affect normal life in Punjab, Haryana and Chandigarh, weather officials said here.
Chandigarh recorded a minimum temperature of 3 degrees Celsius.
In Haryana, Karnal (2.6), Ambala (3.7) and Hisar (3.1) were also in the grip of a cold wave.
Dense fog prevailed in Punjab with visibility being reduced to less than 50 metres at some places on Monday morning.
In Ludhiana and Patiala, the minimum temperature was recorded at 4.1 and 3.4 degrees respectively.
Moderate to dense fog was seen as most places, affecting road and railway traffic.
Flights to and from the Chandigarh airport have been affected for the past over one week.
Met officials said the cold wave and foggy conditions will continue for the next few days.