Philadelphia pollen forecast — Mantua neighborhood
Pollen Today
Today (12 September) pollen in Mantua, Philadelphia is high; ragweed is high; grass is low.
Pollen Tomorrow
Tomorrow (13 September 2026) ragweed remains high, grass increasing, mugwort at low levels.
7-Day Trend
Over the next week grass, mugwort, and ragweed will decrease.
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Air Quality
Air Quality Forecast for Philadelphia AQI today AQI tomorrowPollen for Neighborhoods
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Features and forecast availability vary by region.
Pollen Risk
Today - 12 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 25/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | High | 52/100 |
Tomorrow - 13 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | Moderate | 44/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 12/100 | |
| Ragweed (Ambrosia) | High | 69/100 |
Local Environmental Conditions
A waterway supports hazel and willow along its bank, both strongly allergenic wind-pollinated species, near this part of town. This area, close to home here, has woodland dominated by oak and birch, with birch a leading regional tree-pollen allergen. A park where mown turf grass and ornamental trees add grass and ragweed pollen; this sits not far from here.
Hazel and willow along the water get the season underway before other species, usually the first pollen source active, peaking sometime in February or March. Further into spring, the area's oak and birch stands drive the pollen count, building to its sharpest point across April and May. By late spring, grass pollen is climbing steadily toward a June high point, with ragweed climbing to its own high point from mid-August through October.
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Frequently Asked Questions About Pollen in Pennsylvania
Is pollen high in Philadelphia right now?
On 12 September 2026, overall pollen levels in Philadelphia are high. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Philadelphia tomorrow?
On 13 September 2026, pollen conditions in Philadelphia will be different from today, with ambrosia at high levels, artemisia at low levels and grass increasing
Is pollen expected to decrease in Philadelphia this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Philadelphia?
On 12 September 2026, Ambrosia is the dominant pollen source in Philadelphia. grass are also present but at lower levels. artemisia 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.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
