Oklahoma City, OK Pollen Levels Today

Oklahoma City consistently ranks among the most challenging U.S. metros for seasonal allergies, a result of its position in the Great Plains, windy conditions, and a long growing season that stretches allergen exposure across much of the year.

Tree pollen kicks off the allergy calendar as early as January, when mountain cedar drifts in from Texas, followed by a heavy late-February through April surge of eastern red cedar, oak, elm, ash, mulberry, pecan, and cottonwood. As trees wind down, grass pollen takes over from May through July, dominated by Bermuda grass, along with Johnson grass, Timothy, and fescue—Bermuda in particular can linger into early fall thanks to Oklahoma's warm climate.

Weed season then peaks from August through October, driven heavily by ragweed, but also pigweed, lamb's quarters, sagebrush, and Russian thistle. The overlap between lingering summer grasses and early fall weeds often intensifies symptoms in late August.

Non-pollen triggers are significant as well: persistent prairie winds stir up dust and particulates, outdoor mold spores spike after rain and during humid summer stretches, and periodic drought can elevate airborne irritants.

Overall, Oklahoma City's allergy profile is defined by cedar-heavy winters, Bermuda-dominated summers, and severe ragweed falls, amplified by wind and dust.