Lower Allen Township pollen forecast — Cedar Cliff neighborhood
Pollen Today
Today (20 September) pollen in Cedar Cliff, Lower Allen Township is high; ragweed is high; grass is moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass declining, ragweed declining, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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Pollen Risk
Today - 20 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) | Moderate | 48/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 15/100 |
| Ragweed (Ambrosia) | High | 59/100 |
Tomorrow - 21 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) | Low | 12/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 23/100 |
Local Environmental Conditions
Nearby, close by, hazel and willow crowd the water's edge, both classic sources of early allergenic pollen. This area, not far from here, has a stand of oak and birch, the latter ranked among the region's most potent tree allergens. Grass and ornamental trees within the park boundary contribute modestly to grass and ragweed levels; this sits within the neighborhood.
Along the waterway, hazel and willow release pollen first, leading off the pollen calendar, with a peak generally falling in late winter. Oak and birch in the nearby woodland follow in mid-to-late spring, topping out in the April-to-May stretch. Through late spring, grass pollen climbs steadily toward its June peak, before ragweed becomes the more dominant allergen from mid-August into October.
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Frequently Asked Questions About Pollen in Pennsylvania
Is pollen high in Lower Allen Township right now?
On 20 September 2026, overall pollen levels in Lower Allen Township are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Lower Allen Township tomorrow?
On 21 September 2026, pollen conditions in Lower Allen Township will be different from today, with grass, ambrosia continuing to decline
Is pollen expected to decrease in Lower Allen Township this week?
According to the five-day outlook, grass, ambrosia, and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Lower Allen Township?
On 20 September 2026, Ambrosia is the dominant pollen source in Lower Allen Township. grass and artemisia are also present but at lower levels.
When is pollen season in Lower Allen Township?
How often is the Lower Allen Township pollen forecast updated?
The Lower Allen Township pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Lower Allen Township 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 Lower Allen Township 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 Lower Allen Township, 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/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
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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).
