India Seasonal Pollution Patterns — Monthly AQI by City

Sharp pollution peak in Nov–Feb driven by thermal inversions, post-monsoon biomass burning, festival fireworks and heating emissions.

Summer and winter are elevated; Jul–Sep monsoon rain washes particulates out of the air.

Two distinct peaks — typically winter plus a secondary dust or crop-burning spike.

Relatively uniform AQI through the year — usually coastal or southern cities with stable circulation.