Pollen Count & Forecast for Medellín

Medellín has year-round pollen counts; dry months (December–February) are dominated by Grass (Poaceae) and Pigweed (Amaranthaceae). Monterey Cypress (Cupressus macrocarpa) is prolific on hills like Cerro El Volador and Cerro Nutibara; Andean Alder (Alnus acuminata) grows near the Medellín River and high in Parque Arví.

The valley’s deep bowl shape traps air; thermal inversions hold pollutants and allergens in the urban center. Rainy periods from April to May and October to November increase Mould (Alternaria, Cladosporium) levels; spores thrive in the damp forests of Santa Elena and wet urban gutters.