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Ah-Choo! What's Making You Sneeze?

Season allergies infographic

This information has been reviewed and approved by Ann Hefel, FNP, MS, RN, (February 2016)  

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Summary: Ah-Choo, What’s Making You Sneeze?

Stay ahead of seasonal allergies by taking allergy medication before you have symptoms. Use this calendar to know when your allergy season(s) will start.

  • January —molds
  • February — molds, trees
  • March — molds, trees
  • April — molds, trees
  • May — grass, molds, trees
  • June — grass, molds, trees
  • July — grass, molds, trees,
  • August — mold, ragweed
  • September — mold, ragweed
  • October — mold, ragweed
  • November — mold, ragweed
  • December — mold, ragweed


  • Grows on fallen leaves, compost piles, grasses and grains, and in soil.
  • Warmer climates can have molds year-round.


  • Warmer winters can trigger early pollen release.
  • Common tree allergens: Ash, Birch, Catalpa, Cypress, Elm, Hickory, Maple, Oak, Olive, Pecan, Poplar, Sycamore, Walnut, Western Red Cedar

Grass Pollens

  • Released late spring through mid-summer.
  • Common grass allergens: Bermuda, Johnson, Kentucky Blue, Sweet Vernal, Timothy


  • 75 percent of people are allergic to ragweed
  • Allergenic weeds include: Bottlebrush, Curly dock, Lamb’s quarters, Pigweed, Ragweed, Sagebrush, Sheep's sorrel

Preventive Treatments for Pollen Allergies

  • Take your medications before you have allergy symptoms.
  • Do outdoor activities in the morning when pollen levels are low.
  • Close your windows, even at night, and use the air conditioning.
  • Wash your hands, body and clothes after being outside.