Round Rock, TX Pollen Levels Today

Round Rock, Texas, sits in the heart of Central Texas and contends with one of the most challenging allergy profiles in the United States, driven by its warm, semi-humid climate, mild winters, and extended growing seasons that keep pollen in the air nearly year-round.

The allergy calendar kicks off dramatically in December and January with the infamous "cedar fever," caused by mountain cedar (Ashe juniper) pollen, followed by oak, elm, ash, pecan, and mulberry trees that peak from February through April and often coat the region in yellow dust.

As tree pollen tapers, grass pollen takes over from late April through summer, with Bermuda, Johnson, Timothy, and Bahia grasses producing the heaviest loads, particularly in May and June.

Fall brings a resurgence of symptoms as ragweed dominates from late August through October, joined by pigweed, sagebrush, and lamb's quarters. Overlap between lingering grasses and early fall weeds in late summer frequently intensifies reactions.

Beyond pollen, Round Rock residents also contend with year-round mold spores fueled by humidity and decaying oak leaves, along with dust, cedar mites, and occasional dust from West Texas wind events.

Overall, Round Rock's allergy profile is defined by aggressive cedar winters, heavy spring tree loads, and persistent weed-driven fall flare-ups.