Philadelphia pollen forecast - today, tomorrow and the week ahead
Today (1 August) pollen in Philadelphia is low; grass, mugwort, and ragweed are low. Tomorrow (2 August 2026) levels are similar - grass remains low, ragweed remains low. Over the following five days grass, mugwort, and ragweed will increase. 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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
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 - 1 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
15/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
7/100
-
Ragweed (Ambrosia):
Low
25/100
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 - 2 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
7/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
None
0/100
-
Ragweed (Ambrosia):
Low
20/100
Air quality in Philadelphia
View air qualityPollen forecast for neighborhoods and landmarks in Philadelphia
Sports venues in Philadelphia
Frequently Asked Questions
Is pollen high in Philadelphia right now?
On 1 August 2026, overall pollen levels in Philadelphia are low. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Philadelphia tomorrow?
On 2 August 2026, pollen conditions in Philadelphia will be different from today, with ambrosia at low levels, grass at low levels
Is pollen expected to decrease in Philadelphia this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Philadelphia?
On 1 August 2026, Ambrosia is the dominant pollen source in Philadelphia. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in Philadelphia?
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?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 1 August 2026 at 10:33 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
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.