1. Past Weather and Air Quality Observation: The air quality over Delhi was in the Moderate category with CPCB AQI 179 at 4PM on 20.10.2026. There has been no large change in maximum and minimum temperatures over Delhi during the past 24 hours. The maximum temperatures were in the range of 29-32°C and the minimum temperatures are in the range 18-19°C respectively during past 24 hours over Delhi. The minimum temperatures are normal (-1.5°C to 1.5°C) at most places over Delhi. The maximum temperatures were appreciably below normal (-3.1°C to -5.0°C) at isolated places, below normal (-1.6°C to -3.0°C) at a few places and normal (-1.5°C to 1.5°C) over remaining parts of Delhi. Mainly clear sky with surface wind speed 18 kmph from the northwest direction prevailed over Delhi during past 24 hours. Mainly clear sky with surface wind speeds up to 10 kmph from the west direction likely to prevail during forenoon over the region today.

2. Mainly clear sky. The maximum temperatures over Delhi are likely to be in the range of 30-32°C. The maximum temperatures will be below normal(-1.5°C to 1.5°C)at most places over Delhi. The predominant surface wind is likely to be from the northwest direction with surface wind speed reaching up to 15 kmph during the afternoon. The surface wind speed will decrease coming up to 10 kmph from the northeast direction during evening and night hours on 21.10.2026. Mainly clear sky. The maximum and minimum temperatures over Delhi are likely to be in the range of 31°C to 33°C and 17°C to 19°C, respectively. The minimum temperature will be near normal(-1.5°C to 1.5°C) at most places, and the maximum temperatures will be near normal(-1.5°C to 1.5°C) at most places over Delhi. The predominant surface wind is likely to be from the southwest direction associated with calm wind speeds reaching up to 05 kmph during morning hours.  The surface wind speed will increase becoming up to 15 kmph from the northwest direction during afternoon. The surface wind speed will decrease becoming up to 10 kmph from the north direction during evening and night hours on 22.10.2026.Mainly clear sky. The maximum and minimum temperatures over Delhi are likely to be in the range of 31°C to 33°C and 17°C to 19°C, respectively. The minimum temperature will be near normal(-1.5°C to 1.5°C) at most places, and the maximum temperatures will be near normal(-1.5°C to 1.5°C) at most places over Delhi. The predominant surface wind is likely to be from the northwest direction associated with calm wind speeds reaching up to 05 kmph during morning hours.  The surface wind speed will increase becoming up to 15 kmph from the northwest direction during afternoon. The surface wind speed will decrease becoming up to 10 kmph from the northeast direction during evening and night hours on 23.10.2026. Partly cloudy sky. The maximum and minimum temperatures over Delhi are likely to be in the range of 32°C to 34°C and 18°C to 20°C, respectively. The minimum temperature will be near normal(-1.5°C to 1.5°C) at most places, and the maximum temperatures will be near normal(-1.5°C to 1.5°C) at most places over Delhi. The predominant surface wind is likely to be from the northeast direction with wind speed reaching up to 10 kmph during the morning hours. The surface wind speed will increase becoming up to 20 kmph from the northeast direction during afternoon. The surface wind speed will decrease becoming up to 15 kmph from east direction during evening and night hours on 24.10.2026.

3. Predicted maximum mixing depth is likely to be 2250m on 21.10.2026, 2450m on 22.10.2026, 2600m on 23.10.2026, and 2500m on 24.10.2026 over Delhi. The ventilation index is likely to be 9500 m2/s on 21.10.2026, 18000 m2/s on 22.10.2026, 21000 m2/s on 23.10.2026 and 10500 m2/s on 24.10.2026 over Delhi. The ventilation index lower than 6000 m2/s with an average wind speed of less than 10 kmph is unfavorable for the dispersion of pollutants.

​4. Air quality is likely to be in the Poor category on 21.10.2026. The air quality is likely to be in the Poor category from 22.10.2026 to 24.10.2026. The outlook for the subsequent 6 Days: The air quality is likely to be in the Poor category.

5. Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.

For further information: https://nwp.imd.gov.in/airqualityfc_bulletin_mausam.php