Low
Pollen is low — most people won't notice
Grass pollen is the main trigger · Tomorrow → · Updated 13 hours ago
Today in Tucson: grass pollen is very low, tree pollen is none, weed pollen is none. Overall score: 6/100. Allergies are unlikely for most people right now. Tomorrow is expected to be about the same. Updated at 11:01 PM.
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Pollen levels in Tucson are currently low. Most people should not experience allergy symptoms from pollen.
Tree pollen: None. Grass pollen: Very Low. Weed pollen: None.
Tomorrow's pollen forecast for Tucson is expected to be about the same, with low pollen conditions.
Grass pollen is the highest supported pollen type in Tucson today. Grass pollen is very low.
Tree pollen in Tucson is none today.
Grass pollen in Tucson is very low today.
Weed pollen in Tucson is none today.
Tomorrow's pollen forecast for Tucson is expected to be about the same, with low pollen conditions.
Tucson sits in the Sonoran Desert, and its warm, arid climate combined with a long growing season makes it one of the more challenging cities in the U.S. for allergy sufferers.
Tree pollen dominates from February through April, with mulberry, olive, ash, mesquite, juniper, cottonwood, and palo verde producing especially heavy loads—so much so that Pima County has long banned new plantings of mulberry and olive trees.
As temperatures climb, grass pollen takes over from late April through summer, with Bermuda grass as the primary offender alongside Johnson grass and various native desert grasses; Bermuda can linger well into fall given Tucson's mild climate.
Weed season intensifies in late summer and autumn, driven by the monsoon rains that fuel growth of ragweed, tumbleweed (Russian thistle), careless weed (amaranth/pigweed), and sagebrush, typically peaking from August through October. Overlap between lingering grasses and emerging weeds during the monsoon months often triggers compounded symptoms.
Non-pollen triggers are also significant: blowing dust from dry soils, outdoor molds that spike after monsoon storms, and particulate pollution can all aggravate allergies.
Overall, Tucson's allergy profile is defined by a nearly year-round pollen calendar, desert-specific plants, and dust and mold exacerbated by its dry, windy conditions.