NEW DELHI – It has been raining lightly to moderately in Delhi and the National Capital Region (NCR) all day on Thursday, July 31, 2025. This follows overnight showers that caused flooding in several locations. The monsoon trough is still active over the area, which is why it has been raining so much. This has also helped keep the air quality good.
The average Air Quality Index (AQI) for Delhi on Thursday morning was 56, which is better than Wednesday’s 66. The average AQI for July 2025 was 79, making it the cleanest July on record for Delhi since the AQI was first published in April 2015. An AQI of 51 to 100 is considered “satisfactory,” which means it has little effect on people who are sensitive.
The India Meteorological Department (IMD) said that on Thursday, moderate rain fell all throughout the area. Several important weather stations reported a lot of rain in the 24 hours before 8:30 AM:
39.1 mm at Safdarjung, Delhi’s base station
Palam: 34.6 mm
32.6 mm on Lodhi Road
Ridge: 21mm
16.3 mm in Ayanagar
23.1 mm at Pragati Maidan
25.5 mm in Najafgarh
Pusa: 41 mm
17.5mm in Janakpuri
The IMD says that rain that falls between 15.6mm and 64.4mm is “moderate,” and rain that falls more than 64.4mm is “heavy.”
Delhi has seen a lot of rain in July 2025, with a total of 259.3mm. This is more than the long-term average (LPA) of 209.7mm for the month. Last July, there was 203.7mm of rain, which is barely shy of the usual amount. Delhi also got too much rain in May and June, which came before this. May 2025 was the wettest month ever, with 186.4mm of rain, which is more than the normal amount of 30.7mm. In June, there was 107.1mm of rain, which was 45% more than the average of 74.1mm.
The IMD says that the rain will probably get less heavy starting on Friday, August 1, 2025. The monsoon trough, a protracted period of low pressure that pulls in moisture from the lower levels and causes heavy rain, is predicted to keep affecting the weather for the next few days.