Springfield, MO Pollen Levels Today

Springfield, Missouri, located in the Ozarks, experiences a humid continental climate with warm, moist summers and cool winters—conditions that fuel a long and intense allergy season stretching from early spring through late fall.

Tree pollen kicks things off in March and typically peaks in April, driven by oak, cedar, elm, maple, hickory, walnut, and sycamore, all abundant across the surrounding Ozark hardwood forests.

As tree counts taper in May, grass pollen takes over through June and July, with Kentucky bluegrass, Bermuda, Timothy, orchard grass, and fescue—common in local lawns, pastures, and hayfields—being the primary culprits.

By mid-August, weed pollen dominates, led by ragweed, which thrives in Missouri's open fields and roadsides and remains potent until the first hard freeze in October or November; lamb's quarters, pigweed, and plantain add to the load.

Overlap between lingering grasses and early ragweed in August often intensifies symptoms for multi-sensitive individuals.

Springfield's high humidity also promotes year-round mold, particularly Alternaria and Cladosporium, while dust mites and regional agricultural dust contribute to indoor and outdoor triggers.

Overall, Springfield's allergy profile is defined by a lengthy pollen calendar, heavy ragweed exposure, and persistent mold driven by the region's moisture and dense vegetation.