Chandigarh, Jan. 10 -- Residents shivered through the night as Chandigarh's minimum temperature plunged to 6.1degC on Friday, the lowest it has gone this month. As per the India Meteorological Department (IMD), similar temperatures are likely on nights without fog. Speaking about this, IMD Chandigarh director Surender Paul said that humidity in the fog keeps the temperature from dropping too low. Further, the fog also acts as a blanket, keeping the heat trapped at night. Thus when the fog subsides, the temperatures slide. The minimum temperature on Thursday was 7.6degC. Meanwhile, the maximum temperature rose from 16.1degC on Thursday to 17.1degC on Friday, one degree above normal. Over the next three days, the maximum temperature will remain between 14degC and 16degC while the minimum will remain between 6degC and 7degC. As per the daily bulletin released by the Central Pollution Control Board (CPCB), the AQI of the city was 124 while that of Panchkula was 125, both categorised as moderate. Amid low visibility levels, rail services were hit in theregion. The Sector 39 IMD observatory had recorded visibility of 800 metres early morning while the airport observatory recorded 1,500 metres. Among the delayed trains were the Chandigarh-Karnataka Sampark Kranti Express, which was running four hours, 40 minutes behind schedule, while the Netaji Express arrived an hour and 31 minutes late. The Daulatpur Chowk Jan Shatabdi was rescheduled from New Delhi, causing a delay of four hours and 25 minutes. Among high-frequency services, the Chandigarh Shatabdi from New Delhi reached 35 minutes late, while the Chandigarh Vande Bharat, departing from Ajmer, arrived 41 minutes behind schedule. The Amb Andaura Vande Bharat was 11 minutes late to Chandigarh and 54 minutes late on its onward journey to Amb Andaura. The Kalka-New Delhi Shatabdi also faced minor delays, running five minutes late....