Air Quality and Weather Bulletin for Delhi (04.02.2026)

दिल्लीकेलिएवायुगुणवत्ताऔरमौसमबुलेटिन (04.02.2026)

1. Past Weather and Air Quality Observation: The air quality over Delhi was in Poor category with CPCB AQI 272 at 4 PM on 03.02.2026. There has been fall in the minimum temperature upto 1-2°C and appreciable fall in the maximum temperature upto 3°C - 5°C during the past 24 hours over Delhi. The maximum temperatures over Delhi were around 19°C to 22°C and the minimum temperatures are around 08°C-09°C, respectively. The minimum temperatures are below normal (-1.6°C to -3.0°C) at isolated places and normal (-1.5°C to 1.5°C) over remaining parts of Delhi. The maximum temperatures are appreciably below normal (-3.1°C to -5.0°C) at isolated places and normal (-1.5°C to 1.5°C) over remaining parts of Delhi. Safdarjung Airport reported lowest visibility 350m from 0800 IST to 0830 IST, which thereafter improved to 450m from 0900 IST of today, 04-02-2026. Palam Airport reported lowest visibility 500 m from 0730 IST to 0830 IST, which thereafter improved to 600m from 0900 IST of today, 04-02-2026. Partly cloudy sky conditions with shallow to moderate fog at many places. The winds speed reaching upto 10 kmph from the west direction prevailed over past 24 hours. Mainly clear sky with wind speed reaching upto 10 kmph from the southwest direction to be prevailed over the region in the forenoon today.

2. Mainly clear sky. Sustained surface winds (speed 10-20 kmph). Mist during night. The maximum temperatures are likely to be in the range of 22°C to 24°C. The maximum temperatures will above normal (1.6 to 3.0°C) over Delhi. The predominant surface wind is likely to be from the northwest direction reaching up to 15 kmph during the afternoon hours. The wind speed will decrease becoming less than 12 kmph from the northwest direction during evening and night on 04.02.2026. Mainly clear sky. Sustained surface winds (speed 10-20 kmph). Shallow fog during morning hours. The maximum and minimum temperatures over Delhi are likely to be in the range of 21°C to 23°C and 08°C to 10°C respectively. The minimum temperature will near normal and the maximum temperatures will near normal over Delhi. The predominant surface wind is likely to be from the northwest direction with wind speed reaching up to 15 kmph during the morning hours. The wind speed will increase becoming upto 20 kmph from northwest direction during the afternoon. The wind speed will decrease becoming upto 15 kmph from the west direction during evening and night on 05.02.2026. Partly cloudy sky. Strong surface winds (speed 15-25 kmph) during the day. Shallow fog during morning hours. The maximum and minimum temperatures over Delhi are likely to be in the range of 22°C to 24°C and 09°C to 11°C respectively. The minimum temperature will above normal (1.6 to 3.0°C) and the maximum temperatures will be above normal (1.6 to 3.0°C) over Delhi. The predominant surface wind is likely to be from the northwest direction with wind speed reaching up to 20 kmph during the morning hours. The wind speed will increase becoming upto 25 kmph from northwest direction during the afternoon. The wind speed will decrease becoming upto 20 kmph from the northwest direction during evening and night on 06.02.2026. Partly cloudy sky. Strong surface winds (speed 15-25 kmph) during the day. Shallow fog during morning hours. The maximum and minimum temperatures over Delhi are likely to be in the ranges of 22°C to 24°C and 10°C to 12°C respectively. The minimum temperature will be above normal (1.6 to 3.0°C) and the maximum temperatures will above normal (1.6 to 3.0°C) over Delhi. The predominant surface wind is likely to be from the northwest direction with wind speed reaching up to 20 kmph during the morning hours. The wind speed will increase becoming upto 25 kmph from northwest direction during the afternoon. The wind speed will decrease becoming upto 10 kmph from the northwest direction during evening and night on 07.02.2026.

3. Predicted maximum mixing depth is likely to be 1350m on 04.02.2026, 1000m on 05.02.2026, 1000m on 06.02.2026, and 1450m on 07.02.2026 over Delhi. Ventilation index is likely to be 8500m2/s on 04.02.2026, 7500m2/s on 05.02.2026, 9000m2/s on 06.02.2026 and 15500m2/s on 07.02.2026over Delhi. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.

4. The air quality is likely to be in the Very Poor category on 04.02.2026. The air quality is likely to be in the Poor category on 05.02.2026. The air quality is likely to be in the Moderate category from 06.02.2026 to 07.02.2026. The outlook for the subsequent 6 Days: The air quality is likely to be in the Moderate to Poor category.

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

Air Quality Bulletin for Ahmedabad (04.02.2026)

1. The overall air quality of Ahmedabad was observed in the Moderate category with AQI 129 on 03.02.2026.

2. The air quality is likely to be in the Moderate category 04.02.2026 to 06.02.2026.

Air Quality Bulletin for Mumbai (04.02.2026)

1. The overall air quality of Mumbai was observed in the Moderate category with AQI 140 on 03.02.2026.

2. The air quality is likely to be in the Moderate category from 04.02.2026 to 06.02.2026.

Air Quality Bulletin for Pune (04.02.2026)

1. The overall air quality of Pune was observed in the Moderate category with AQI 169 on 03.02.2026.

2. The air quality is likely to be in the Moderate category from 04.02.2026 to 06.02.2026.