Pollen today
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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 Pittsburgh 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 2:21 pm 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 Pittsburgh 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 14 to Oct 20 | Not recorded | Not recorded | 1 Very 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 Pittsburgh 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.
33 allergists enrolled in Medicare practice in the Pittsburgh area: 1.36 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 Pittsburgh 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.
Norway maple makes up 11% of Pittsburgh’s street trees and red maple another 10%, according to a 2014 inventory of 33,498 trees.2 Maples as a group make up 29% of the inventoried trees.2 Ash and maple trees were popular replacements for American elm in the wake of Dutch elm disease.2 Red maple’s flowers appear in early spring, usually before its leaves.3
A typical year at Pittsburgh International Airport brings about 44 inches of snow and about 181 days between the last spring freeze and the first fall freeze.1 Oak forests dominate the southern two-thirds of Pennsylvania, with red and white oaks growing alongside tuliptree, red maple and hickories on lower slopes.4
In general, ragweed pollen dispersal in Pennsylvania peaks in the last week of August and the first week of September.5 Ragweed grows best in disturbed soils.5 Dry, windy, sunny weather favors the spread of its pollen, while rain scrubs pollen from the air.5
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Pittsburgh today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Pittsburgh. 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 Pittsburgh, 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