Reno, NV Pollen Levels Today

Nestled in the high desert on the eastern slope of the Sierra Nevada, Reno has a dry, windy climate that keeps airborne allergens circulating for much of the year.

The allergy season typically kicks off in early spring, when tree pollen from juniper, cedar, cottonwood, aspen, willow, ash, elm, and mulberry surges from March through May, with junipers often producing especially heavy counts on warm, breezy days.

As temperatures rise, grass pollen takes over from late May into July, dominated by Bermuda, timothy, orchard, and Kentucky bluegrass, along with irrigated pasture grasses in the Truckee Meadows.

By late summer and into fall, weed pollen becomes the primary concern, with sagebrush, rabbitbrush, Russian thistle (tumbleweed), pigweed, and ragweed peaking from August through October. Overlap between lingering grasses and emerging weeds in mid-summer can intensify symptoms for sensitive individuals.

Beyond pollen, Reno's arid conditions and frequent winds stir up significant dust, and wildfire smoke drifting in from California and the Sierra is an increasingly common seasonal irritant. Indoor and outdoor mold levels stay relatively low due to low humidity, though irrigated landscaping creates localized hotspots.

Overall, Reno's allergy profile is defined by desert weeds, wind-driven dust, and smoke layered over a standard tree-and-grass progression.