Miami, FL Pollen Levels Today

Miami's subtropical climate, high humidity, and mild winters create an unusually long allergy season, with pollen present in some form nearly year-round.

Tree pollen is the earliest and most intense trigger, ramping up in late December and peaking from February through April. Dominant offenders include oak, which blankets the region in yellow-green dust, along with cedar, pine, Australian pine, mulberry, bayberry, and palm species.

As tree counts taper, grass pollen takes over from late spring through summer and often lingers into fall, driven by Bahia, Bermuda, Johnson, and St. Augustine grasses—all common in South Florida lawns and roadsides.

Weed pollen rises in late summer and fall, with ragweed as the primary culprit, joined by pigweed, dog fennel, and sedges. Because Miami's growing season is so extended, overlap between grass and weed seasons is common from September through November, intensifying symptoms for many sufferers.

Beyond pollen, the region's persistent humidity fuels year-round outdoor and indoor mold (notably Cladosporium and Alternaria), while dust mites thrive in warm coastal air. Urban traffic pollution and occasional Saharan dust events can further aggravate symptoms.

Overall, Miami's allergy profile is defined by a prolonged, overlapping pollen calendar compounded by heavy mold pressure.