Philadelphia, PA Birch Pollen
Birch pollen in Philadelphia usually peaks around April, reaching High at its worst. Philadelphia's allergy year opens with an early tree season and ends with a long ragweed fall: maple and birch in spring, grass through early summer, and ragweed from late summer into October.
Birch pollen peaks in April and May and is a frequent trigger for oral allergy symptoms with apples and stone fruit.
Birch in Philadelphia today
Tuesday, July 28, 2026
Birch pollen by month in Philadelphia
How birch usually runs across the year. The current month is outlined.
Managing birch season in Philadelphia
If birch is your trigger, start a daily antihistamine like cetirizine (Zyrtec) or loratadine (Claritin) a week or two before the April peak, rather than waiting for symptoms. Keep windows closed on high-count mornings, shower and change clothes after time outside, and run the AC on recirculate in the car.
When symptoms don't ease with over-the-counter medicine, an allergist in Pennsylvania can test whether birch is really what you react to and talk through longer-term options like allergy shots.
Sources
- American College of Allergy, Asthma & Immunology (ACAAI). "Tree Allergy." https://acaai.org/allergies/allergic-conditions/tree-pollen/
- American Academy of Allergy, Asthma & Immunology (AAAAI). "Pollen-Food Allergy Syndrome (Oral Allergy Syndrome)." https://www.aaaai.org/tools-for-the-public/conditions-library/allergies/pfas-oral-allergy-syndrome
More pollen in Philadelphia
- Philadelphia ragweed pollen — peaks September.
- Philadelphia grass pollen — peaks June.
- Philadelphia oak pollen — peaks April.
- Philadelphia maple pollen — peaks March to April.
- Philadelphia pollen calendar — every allergen, month by month.
- Philadelphia pollen count today — live tree, grass, and weed levels with a 5-day forecast.
- Pennsylvania pollen season — the statewide calendar and other cities.
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Sign up for free alertsSeasonal pattern based on Pennsylvania pollen data and local sources. Today's reading updated daily. MyPollenPal