Pollen today
Loading today’s values…
Pollen today
Loading today’s values…
Google gave no index for tree, grass or weed pollen here today.
Next four days, highest level each day:
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Google’s index for each plant it models in Philadelphia today. A plant out of season has no index.
Source: Includes pollen data from GoogleGoogle Maps
The forecast that moves pollen around, and the air beside it.
Forecast: National Weather Service, updated 4:08 am ET.
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Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for Philadelphia began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 21 to Oct 27 | Not recorded | Not recorded | 1 Very low |
| Oct 14 to Oct 20 | Not recorded | Not recorded | 2 Low |
Source: Includes pollen data from GoogleIncludes data from Google Maps
What this forecast doesn’t measure, and when to get help.
Google’s index covers tree, grass and weed pollen only, so there is no mold level for Philadelphia on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
102 allergists enrolled in Medicare practice in the Philadelphia area: 1.61 for every 100,000 people, more than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the Philadelphia area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
The geography, climate and plants behind each season here, with a source for every fact.
Greater Philadelphia straddles two physiographic provinces: the Piedmont, a plateau that reaches west to the Appalachian Mountains, and the relatively flat Coastal Plain.2 On the Pennsylvania side, the Coastal Plain is only a narrow band, up to five miles wide, along the Delaware River.2 A typical year at the airport has about 224 days between the last spring freeze and the first fall freeze, and about 44 inches of precipitation.1
A Forest Service study published in 2016 estimated that the city has about 2.9 million trees, with canopy covering 20 percent of its area.3 The most common species were spicebush, black cherry, ash, tree-of-heaven and boxelder.3 By leaf area, sycamores (including London planetree), northern red oak, black walnut, red maple and Norway maple led.3
Boxelder, one of the maples, is wind pollinated and flowers with or before its leaves from March to May, depending on location.4 White ash flowers with or just before its leaves in April and May, and wind carries its pollen.5 Ragweed grows in almost all states, and in many parts of the country its pollination now runs from early August through October.6
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Philadelphia today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Philadelphia. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
Twice a day. We fetch new values soon after midnight in Philadelphia, so each day starts with its own values, and again after Google’s daily model run, usually by about 10:30 am ET. Each section shows when its values were retrieved.
Since October 14, 2026. The year in pollen above fills in as each day is recorded, and weeks before then show no data. Google doesn’t provide past values, so nothing earlier can be added.
Source: Includes pollen data from GoogleIncludes data from Google Maps