Philadelphia pollen forecast - today, tomorrow and the week ahead

Today (11 July) pollen in Philadelphia is low; grass is low. Tomorrow (12 July 2026) levels are similar - grass increasing. Over the following five days grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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Philadelphia's extensive green network, anchored by Fairmount Park and the Schuylkill River corridor, features oak, birch, and maple as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Pennsylvania farmland and the Delaware River valley contribute additional grass and tree pollen, while the flat coastal plain allows pollen to disperse readily under prevailing westerly winds.

Today - 11 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    2/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.

Tomorrow - 12 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Medium

    28/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Philadelphia

View air quality

Pollen forecast for neighborhoods and landmarks in Philadelphia

Barnes Foundation East Passyunk Eastern State Penitentiary Fairmount Park Fishtown Germantown Independence Hall Liberty Bell Manayunk Northern Liberties Old City Penn's Landing Philadelphia Museum of Art Reading Terminal Market Rittenhouse Square South Street

Sports venues in Philadelphia

Aronimink Golf Club – Championship Course Merion Golf Club – East Course

Frequently Asked Questions

Is pollen high in Philadelphia right now?

On 11 July 2026, overall pollen levels in Philadelphia are low. Grass is the main contributor to airborne pollen

Will pollen levels change in Philadelphia tomorrow?

On 12 July 2026, pollen conditions in Philadelphia will be different from today, with grass increasing

Is pollen expected to decrease in Philadelphia this week?

According to the five-day outlook, grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

Which pollen types are currently active in Philadelphia?

On 11 July 2026, Grass is the dominant pollen source in Philadelphia. willow, alder, ambrosia, artemisia, birch, cypress, and oak are not currently active.

When is pollen season in Philadelphia?
Philadelphia's pollen season opens with maple and elm from late February, followed by oak and birch through April and May. Grass pollen peaks through June and July, with ragweed contributing from August through September. The humid temperate climate means the season is well-defined and intense, while surrounding Pennsylvania farmland and the Delaware River valley contribute additional grass and tree pollen under prevailing westerly winds.
How often is the Philadelphia pollen forecast updated?

The Philadelphia pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Philadelphia come from nearby or far away?

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Are pollen levels in Philadelphia based on measurements or forecasts?

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Philadelphia, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.

Want to see pollen forecasts for other cities in United States?

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Check pollen in other popular cities:

Rio de Janeiro Copenhagen Paris Athens Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 11 July 2026 at 10:14 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Philadelphia.

For long term forecasts and maps, see the Airmine app

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