New Delhi, Dec 22 (ANI): Dense fog enveloped Delhi on Monday, adversely affecting flights and trains. According to the media reports, 16 flights were delayed due to dense fog. Fifty trains were also delayed while 12 others were rescheduled due to fog. Visibility on roads also remained very poor. According to Indian Meteorological Department the sky will remain cloudy on Monday. The maximum and minimum temperature is likely to be around 16 and 6 degrees Celsius, respectively.