Seasonal allergies in Tucson are largely influenced by the city’s desert climate and the plants that thrive in it. In the spring, trees like palo verde, mesquite, and mulberry release heavy pollen into the air, marking the start of allergy season. As the months progress into late spring and summer, grasses such as Bermuda and ryegrass become the dominant pollen sources. The combination of tree and grass pollens during this time creates a prolonged period of high allergen levels, making spring and early summer especially challenging for those sensitive to airborne particles.
In the fall, weed pollens—particularly from ragweed—become the primary triggers, often overlapping with lingering grass pollens. Tucson’s dry conditions and frequent winds help disperse pollen and dust, keeping allergen levels elevated across much of the year. The long growing seasons and lack of consistent rainfall mean that allergenic plants can thrive and release pollen over extended periods. As a result, seasonal allergies in Tucson tend to last longer than in many other parts of the country, making it one of the more difficult regions for allergy sufferers.
