Brooklyn pollen forecast — Dyker Heights neighborhood
Pollen Today
Today (20 September) pollen in Dyker Heights, Brooklyn is high; ragweed is high; grass is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains moderate, ragweed declining.
7-Day Trend
Over the next week grass and mugwort will increase; ragweed will decrease.
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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 | 36/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | High | 57/100 |
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) | Moderate | 30/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 50/100 |
Local Environmental Conditions
Oak and birch dominating the treeline, both heavy contributors to the spring pollen load, close to this spot. Nearby, just outside the immediate area, well-kept lawns and ornamental trees in this park add their share of grass and ragweed pollen. Local wind exposure and land use can shift the exact mix slightly from block to block.
Woodland oak and birch pick up the pace next, through mid-to-late spring, reaching maximum intensity across the April-May window. Grass pollen counts rise through late spring, reaching their peak around June, with ragweed then rising to the fore from mid-August through October. Warmer or wetter years can pull these peaks a week or two earlier or later.
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Frequently Asked Questions About Pollen in New York
Is pollen high in Brooklyn right now?
On 20 September 2026, overall pollen levels in Brooklyn are high. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Brooklyn tomorrow?
On 21 September 2026, pollen conditions in Brooklyn will be different from today, with grass at moderate levels and ambrosia continuing to decline
Is pollen expected to decrease in Brooklyn this week?
According to the five-day outlook, ambrosia pollen levels are expected to gradually decrease, while artemisia and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Brooklyn?
On 20 September 2026, Ambrosia is the dominant pollen source in Brooklyn. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Brooklyn?
How often is the Brooklyn pollen forecast updated?
The Brooklyn pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Brooklyn 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 Brooklyn 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 Brooklyn, 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).
