National capital Delhi's temperature is likely to drop to 9 degrees Celsius from November 17 onwards and is expected to witness moderate fog, according to the predictions of the India Meteorological Department (IMD).
Delhi on Saturday observed a clear sky with shallow fog. The maximum and minimum temperatures for the day will be at 26 degrees Celsius and 11 degrees, respectively, as per IMD officials.
The relative humidity at 8.30 a.m. was recorded at 90 per cent.
Delhi registered maximum and minimum temperatures at 27.4 degrees and 11.1 degrees respectively on Friday.
The overall air quality on Saturday morning stood at 499 i.e. under 'severe' category, according to the System of Air Quality and Weather Forecasting And Research (SAFAR).
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The level of PM 10 and PM 2.5 pollutants in the air was 134 and 72, respectively.
According to Central Pollution Control Board (CPCB) data at 9 a.m., Anand Vihar's AQI stood at 468, ITO's at 484, RK Puram's at 433 and Sri Aurobindo's at 452.
An AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', then 401 and between 500 is considered 'severe'.
According to the Air Quality and Weather Bulletin for Delhi NCR for Air Quality Early Warning System for Delhi, "The air quality is likely to improve marginally but remain in severe category on November 14. Slow winds during the daytime and calm winds during evening/night are extremely unfavourable for the dispersion of pollutants. The unfavourable meteorological conditions are likely to prevail for the next five days.
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"The air quality is likely to remain in the upper end of the 'very poor' category and further deteriorate from November 15 and may reach in 'severe' category. PM2.5 to be the predominant pollutant," it added.
