Schaumburg, IL Pollen Levels Today

Schaumburg, Illinois, sits in the humid continental climate zone of the Chicago metropolitan area, giving it a pronounced four-season allergy pattern with distinct pollen surges and persistent mold activity tied to the region's lake-influenced humidity.

The allergy year typically begins in late March and runs through April and May, when tree pollen dominates the air. Common offenders include oak, maple, birch, elm, ash, cottonwood, and walnut, with oak and maple often producing the highest counts.

As trees taper off in late May, grass pollen takes over through June and into July, driven primarily by Kentucky bluegrass, timothy, orchard grass, and ryegrass—species widely planted across suburban lawns and open prairie remnants.

By mid-August, weed pollen becomes the defining issue, with short and giant ragweed leading the way, supplemented by lamb's quarters, pigweed, and sagebrush well into October.

The late-spring overlap between trees and grasses, and the August overlap between grasses and early ragweed, frequently intensify symptoms for multi-sensitive individuals.

Non-pollen triggers are also significant: outdoor mold spores thrive in Schaumburg's humid summers and damp leaf litter each fall, while indoor dust mites and occasional ozone pollution add year-round pressure.

Overall, Schaumburg's profile is marked by heavy ragweed falls, robust tree springs, and persistent mold.