Arizona's desert climate produces a unique pollen mix. Mulberry and olive trees are major spring triggers in the Phoenix valley. Grass pollen extends through the monsoon season, and ragweed can be significant in fall.
Peak pollen season in Arizona: February–October. Primary allergens: MulberryOliveGrass
Tree pollen is the first major allergen each year in Arizona, typically starting in late winter with cedar and alder, followed by oak and birch through May.
Grass pollen takes over in late spring through early summer, peaking from May to July depending on location within the state.
Ragweed dominates fall allergies in Arizona, typically from August through October. It's the most widespread fall allergen in the US.
The pollen count in Arizona varies by city and season. Peak pollen season runs February–October. Select a city above for live data.
Pollen levels vary across Arizona. Cities in warmer, more humid areas typically see higher counts. Check individual city pages for current levels.
Pollen season in Arizona peaks in February–October. Tree pollen starts in late winter, followed by grass in summer and ragweed in fall.