- Seasonal allergies can occur at different times of the year depending on the type of pollen or environmental allergen.
- Tree pollen allergies typically begin in early March and last through May, sometimes extending into early June.
- Grass pollen allergies are most common during May and June.
- Weed pollen allergies typically occur from August through October and can continue until the first frost.
- Outdoor mold allergies can occur whenever the ground is not frozen. Mold exposure may increase in the fall due to fallen leaves and decaying plants, but levels vary depending on weather conditions.
Pollen and Seasonal Allergies
Learn when tree, grass, and weed pollen allergies are most common and how outdoor mold exposure can affect children throughout the year.
Sarah Taylor-Black, MD
