Town of Hempstead pollen forecast — Oil City neighborhood
Pollen Today
Today (20 September) pollen in Oil City, Town of Hempstead is moderate; grass is moderate; mugwort and ragweed are low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains moderate, ragweed remains low, 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 | 35/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 3/100 |
| Ragweed (Ambrosia) | Low | 13/100 |
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 | 27/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 6/100 |
Local Environmental Conditions
The waterway's edge supports hazel and willow, species known for potent, wind-carried pollen; this sits a short distance from here. This area, within the neighborhood, has the tree cover here leans heavily on oak and birch, both key drivers of spring pollen. As with most local readings, actual levels can vary somewhat with short-term weather swings.
Along the waterway, hazel and willow release pollen first, topping out well before most other trees start releasing pollen, around February and March. Oak and birch in the woods pick up where the earlier species leave off, usually hitting its highest point sometime between mid-April and mid-May. Moving into early summer, grass pollen climbs to its seasonal high in June, and then ragweed picks up the slack, running from mid-August through October.
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Frequently Asked Questions About Pollen in New York
Is pollen high in Town of Hempstead right now?
On 20 September 2026, overall pollen levels in Town of Hempstead are moderate. Grass is the main contributor to airborne pollen, while artemisia and ambrosia remain at lower levels
Will pollen levels change in Town of Hempstead tomorrow?
On 21 September 2026, pollen conditions in Town of Hempstead will be different from today, with grass at moderate levels, ambrosia at low levels
Is pollen expected to decrease in Town of Hempstead this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels will increase later in the week.
Which pollen types are currently active in Town of Hempstead?
On 20 September 2026, Grass is the dominant pollen source in Town of Hempstead. artemisia and ambrosia are also present but at lower levels.
When is pollen season in Town of Hempstead?
How often is the Town of Hempstead pollen forecast updated?
The Town of Hempstead pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Town of Hempstead 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 Town of Hempstead 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 Town of Hempstead, 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).
