Irondequoit pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Irondequoit 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 | 41/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 14/100 |
| Ragweed (Ambrosia) | High | 56/100 |
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 | 10/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 25/100 |
Local Environmental Conditions
Irondequoit's Monroe County New York Rochester suburban setting features oak, maple, and birch as the main tree pollen sources, with exposure varying between the wooded Irondequoit Bay and Lake Ontario shoreline residential areas and the more built-up commercial corridors along Titus Avenue. The Lake Ontario and Irondequoit Bay proximity creates strong onshore lake breezes that create distinct coastal-inland pollen gradients, while the bay park system contributes locally significant riparian woodland pollen throughout the season.
Irondequoit's Rochester suburban setting in New York produces a season opening in late March with elm and maple before birch and oak peak through May. Grass from surrounding New York farmland peaks through June and July before mugwort and nettle extend exposure into September. The Lake Ontario proximity moderates temperatures and lake breezes can periodically suppress pollen dispersal throughout this Monroe County lakefront community.
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Frequently Asked Questions About Pollen in New York
Is pollen high in Irondequoit right now?
On 20 September 2026, overall pollen levels in Irondequoit are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Irondequoit tomorrow?
On 21 September 2026, pollen conditions in Irondequoit will be different from today, with ambrosia, grass continuing to decline
Is pollen expected to decrease in Irondequoit 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 Irondequoit?
On 20 September 2026, Ambrosia is the dominant pollen source in Irondequoit. grass and artemisia are also present but at lower levels.
When is pollen season in Irondequoit?
How often is the Irondequoit pollen forecast updated?
The Irondequoit pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Irondequoit 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 Irondequoit 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 Irondequoit, 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).
