Lexington, KY Pollen Levels Today

Lexington, Kentucky sits in the heart of the Bluegrass region, where a humid subtropical climate, fertile limestone soils, and a long growing season combine to produce one of the more challenging allergy profiles in the country.

Tree pollen kicks off the season in late February and typically peaks from late March through April, driven by oak, maple, hickory, sycamore, birch, cedar, and the region's abundant Eastern red cedar and walnut. As tree counts taper in May, grass pollen takes over, with Kentucky bluegrass—true to the region's nickname—along with timothy, orchard grass, and fescue producing heavy loads from May through July.

Ragweed dominates the fall allergy landscape from mid-August through the first hard frost in October, joined by pigweed, lamb's quarters, plantain, and sagebrush. The transitional weeks between tree and grass season, and again between grass and weed season, often bring overlapping exposures that can intensify symptoms.

Beyond pollen, Lexington's persistent humidity fuels year-round outdoor and indoor mold, particularly Alternaria and Cladosporium, while dust mites thrive in the muggy summer months. Horse farms, agricultural activity, and occasional Ohio Valley air stagnation can further aggravate sensitivities.

Overall, Lexington's allergy profile is defined by prolonged, high-intensity seasons across all three pollen categories, compounded by significant mold pressure.