Cold wave is set to make a comeback in Delhi as the minimum temperature is likely to drop by four degrees Celsius over the next two-three days, the India Meteorological Department said on Monday. The maximum is likely to settle around 16 degrees Celsius. Dense-to-very-dense fog is also predicted during the period. On Monday morning, the minimum temperature stood at 7.4 degrees Celsius. Delhi had recorded a cold day on Sunday with the maximum temperature dropping to 15 degrees Celsius, six notches below normal and the lowest this month.