Rohit Katial, M.D., National Jewish Medical and Research Center
Question: What impact does the weather have on seasonal allergies?
Answer: So weather clearly has an impact on the plants, how much growth you have, and it also has an impact on how the plants release the pollen. So the weather can be both a positive and a negative thing. For example, if we get a lot of rain that tends to wash out the pollen from the air, then you don't have as much pollen dispersed. That's a good thing for allergy sufferers.
On the other hand, right after the rain, the humidity and the warm weather that may exist after the rain will then enhance pollen release on subsequent days after a big rainstorm -- you may get a surge in pollen counts. So the weather factors such as rain can really play both a positive and a negative effect from the standpoint of the patient.
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