Low
Pollen is low — most people won't notice
Multiple pollen types are active · Tomorrow ↑ · Updated 11 hours ago
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Pollen levels in Phoenix are currently low. Most people should not experience allergy symptoms from pollen.
Tree pollen: Very Low. Grass pollen: Very Low. Weed pollen: None.
Yes, pollen conditions in Phoenix are expected to worsen tomorrow.
Phoenix, Arizona, has one of the most challenging allergy climates in the United States, driven by its hot desert environment, low humidity, and a nearly year-round pollen season that gives local residents little reprieve.
Tree pollen dominates from February through April, with mulberry, olive, ash, cottonwood, juniper, and mesquite producing especially heavy loads—so much so that many municipalities have restricted new plantings of mulberry and olive.
As temperatures climb, grass pollen becomes the primary trigger from late April through summer, with Bermuda grass being by far the most problematic, alongside ryegrass and johnsongrass. Because Bermuda grass can pollinate into the fall, it frequently overlaps with weed season, intensifying symptoms for many sufferers.
Weed pollen peaks from late summer through November, led by ragweed, tumbleweed (Russian thistle), careless weed (pigweed/amaranth), and sagebrush, all well-adapted to the Sonoran Desert.
Beyond pollen, Phoenix residents contend with significant non-pollen triggers: airborne dust from surrounding desert terrain, haboobs during monsoon season, elevated ozone and particulate pollution trapped by the valley's geography, and indoor and outdoor mold spikes following summer rains.
Overall, Phoenix's allergy profile is defined by extended overlapping pollen seasons, desert-specific weeds, and persistent dust and pollution exposure.