Pollen Count & Forecast for Chennai

Chennai’s summer allergy season (March-June) is dominated by Parthenium and Neem; Parthenium (Parthenium hysterophorus) is prolific in vacant plots and along the Cooum River; Neem (Azadirachta indica) is widespread in Guindy National Park. Casuarina (Casuarina equisetifolia) is common along Marina Beach; high Bermuda Grass (Cynodon dactylon) levels persist year-round near the Adyar River banks.

Humid air from the Bay of Bengal traps particulates; sea breezes push inland allergens toward the city center. The monsoon months (October-December) see high Mould (Aspergillus, Penicillium) spore counts, originating from damp vegetation in the Arignar Anna Zoological Park and waterlogged urban environments.