What is the reason behind Delhi's air quality improving to 'good' category?

Delhi's air quality improved to the 'good' category with the AQI dropping to 29 at 5:30 am on Tuesday. The national capital recorded 'good' air quality after continuous monsoon showers washed pollutants out of the atmosphere and winds dispersed the pollutants instead of letting them settle over the city. The AQI reading peaked at 57 at 12:31 pm.