Upper Nazareth Township pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Upper Nazareth Township is moderate; grass and ragweed are moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort remains low, ragweed remains moderate, grass declining.
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 | 32/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 13/100 |
| Ragweed (Ambrosia) | Moderate | 48/100 |
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 | 22/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 3/100 | |
| Ragweed (Ambrosia) | Moderate | 37/100 |
Local Environmental Conditions
Located just around the area, this area has a stretch of hazel and willow lines the water, feeding some of spring's earliest pollen. This area, just outside the immediate area, has a green space where lawn grass and ornamental plantings top up the local grass and ragweed count. Seasonal timing here generally tracks the wider region, give or take a week or so.
Hazel and willow near the water open the pollen calendar early, climbing steadily from late winter into March. Grass pollen climbs toward a June peak, with ragweed climbing to its own high point from mid-August through October. Exact peak dates shift by a few weeks year to year depending on temperature and rainfall.
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Frequently Asked Questions About Pollen in Pennsylvania
Is pollen high in Upper Nazareth Township right now?
On 20 September 2026, overall pollen levels in Upper Nazareth Township are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Upper Nazareth Township tomorrow?
On 21 September 2026, pollen conditions in Upper Nazareth Township will be different from today, with ambrosia at moderate levels, artemisia at low levels and grass continuing to decline
Is pollen expected to decrease in Upper Nazareth Township 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 Upper Nazareth Township?
On 20 September 2026, Ambrosia is the dominant pollen source in Upper Nazareth Township. grass and artemisia are also present but at lower levels.
When is pollen season in Upper Nazareth Township?
How often is the Upper Nazareth Township pollen forecast updated?
The Upper Nazareth Township pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Upper Nazareth 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 Upper Nazareth 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 Upper Nazareth 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. |
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).
