Kolkata: The city experienced its coldest day in 4 years on Wednesday as the mercury dipped to 12 degree Celsius, two degrees below normal.The minimum temperature in the city and its adjoining areas may drop further in the next couple of days. The mercury may hover around 10 degree Celsius by the end of the year, predicted the Regional Meteorological Centre in Alipore. Earlier, the city’s temperature had dropped to 12.9 degree Celsius on 14 December this year. Also Read – Rain batters Kolkata, cripples normal lifeThe winter chill has been intensified due to the uninterrupted flow of the northwesterly wind, which brings the cold wave into the South Bengal districts. “The minimum temperature may hover around 10 degree Celsius in the next few days. It is unlikely to fall any further,” said a senior official of the Regional Meteorological Centre. According to the Met office, a cold wave condition may prevail in some districts. The winter chill has been more intense in North Bengal, with Darjeeling touching 3 degree Celsius. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedThe Met office also said that the visibility would be considerably reduced in several parts of the South Bengal districts, particularly during the morning hours, due to mist. The temperature has dropped because of a north-western cold wind and will remain a few degrees below normal for the next few days. The minimum temperature dipped to 8 degree Celsius in Sriniketan and 9 degree Celsius in Asansol. The mercury plummeted to around 10-11 degree Celsius in Bankura and West Midnapore, while Diamond Harbour in South 24-Parganas remained at 11 degree Celsius on Wednesday. According to a weather expert, for the past few days water vapour in the air was high in the city, which resulted in mist especially in the morning. As the vapour started evaporating, people started witnessing a cold spell. Pavement dwellers were seen warming themselves beside small fires in districts like West Burdwan, Birbhum, Purulia and Bankura, as the temperature plunged. A cold spell has been continuing in various North Bengal districts and some South Bengal districts as well. According to the weather official, it looks like the cold spell may continue for quite some time. The flow of cold wave had been interrupted in the state two weeks ago, following the formation of a low pressure trough over Bay-of-Bengal and a cyclonic circulation. After the low pressure trough cleared, the temperature started dipping across the state.