Low
Pollen is low — most people won't notice
Grass pollen is the main trigger · Tomorrow → · Updated 13 hours ago
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Pollen levels in Peoria are currently low. Most people should not experience allergy symptoms from pollen.
Tree pollen: None. Grass pollen: Moderate. Weed pollen: None.
Pollen conditions in Peoria are expected to remain similar tomorrow.
Peoria, Arizona sits in the Sonoran Desert northwest of Phoenix, where a hot, arid climate and extended growing season create a nearly year-round allergy environment rather than sharply defined seasons.
Tree pollen is the earliest major trigger, typically emerging in February and peaking from March through April. Mulberry, olive, ash, cottonwood, mesquite, and palo verde are among the heaviest local contributors, with mesquite often extending activity well into late spring.
As trees taper, grass pollen takes over from April through summer and can persist into early fall thanks to irrigated lawns; Bermuda grass is the dominant culprit, alongside rye and Johnson grass.
Weed season ramps up in late summer and runs through November, driven by ragweed, russian thistle (tumbleweed), careless weed (pigweed), and sagebrush. Overlap between late-season grasses and early weeds in August and September often intensifies symptoms for sensitive residents.
Non-pollen allergens also play a significant role: chronic dust from the surrounding desert, windblown particulates during haboobs, indoor and outdoor mold around irrigated landscaping, and regional air pollution trapped by valley geography all contribute.
Overall, Peoria's allergy profile is defined by prolonged exposure, dust-heavy air, and substantial overlap between desert flora and cultivated landscaping.