India, Nov. 7 -- A thick haze of pollutants and shallow fog shrouded Delhi in the early hours of Friday, even as the minimum temperature of 12.7degC was two degrees below normal. Persistent cold northwesterly winds were expected to dip the mercury by 1-2degC over the weekend. On Monday, the minimum temperature was expected to be below 10degC. The mercury dipped below 15degC for the first time this season on Thursday.

An India Meteorological Department (IMD) official said a gradual dip in night-time temperature will continue. "The mercury usually dips after snowfall and when northwesterly winds blow. Clear skies also add to the effect as the surface heating that occurs during the day is lost into the atmosphere at night."

On Friday, the ...