Pollen Count & Forecast for Las Vegas

Las Vegas’s spring allergy season (February–May) is dominated by Mulberry and Olive pollen; White Mulberry (Morus alba) prolific in the Scotch 80s neighborhood; European Olive (Olea europaea) widespread near Sunset Park. Ash (Fraxinus velutina) and Juniper (Juniperus osteosperma) contribute from the Spring Mountains and Mount Charleston. Summer and autumn see high Bermuda Grass (Cynodon dactylon) and Big Sagebrush (Artemisia tridentata) levels, originating from the Desert Pines Golf Club and Red Rock Canyon.

The Las Vegas Valley acts as a basin; surrounding mountain ranges trap wind-blown dust and pollen. Arid conditions keep outdoor counts low. Late summer and winter see elevated Mould (Aspergillus, Penicillium) spore counts, from the Las Vegas Wash and wetland areas near Lake Mead.