Hempstead, New York Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Hempstead, New York is low; grass, ragweed, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (12 October 2026) levels are similar to today.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase; mold (cladosporium) will decrease; mold (alternaria) will remain stable.
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Pollen Risk
Today - 11 October
| 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) | Low | 5/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Low | 6/100 |
| Mold (Alternaria) | Low | 9/100 |
| Mold (Cladosporium) | Low | 18/100 |
Tomorrow - 12 October
| 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 | 8/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 10/100 | |
| Mold (Alternaria) | Low | 6/100 | |
| Mold (Cladosporium) | Low | 14/100 |
Local Environmental Conditions
Built-up land and woodland share the area around the center of Hempstead, New York, plus some open grassland. Common allergenic trees nearby include oak and maple. Grasses are a major source, with mugwort and pigweed adding to the weed pollen load. Locally, street trees, gardens and lawns supply most pollen in the built-up parts.
Oak and maple lead the season in late spring, as temperatures climb to around 15°C, and tree pollen reaches its peak. Grasses take over in early summer and keep pollen in the air into early fall. The season closes with mugwort and pigweed from midsummer into early fall. Warm, damp weather from early summer into early fall also raises mold spore levels.
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Frequently Asked Questions About Pollen in New York
Is pollen high in Hempstead, New York right now?
On 11 October 2026, overall pollen levels in Hempstead, New York are low. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels
Will pollen levels change in Hempstead, New York tomorrow?
On 12 October 2026, pollen conditions in Hempstead, New York will be similar to today, with grass at low levels, ambrosia at low levels
Is pollen expected to decrease in Hempstead, New York 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 Hempstead, New York?
On 11 October 2026, Grass is the dominant pollen source in Hempstead, New York. ambrosia are also present but at lower levels. artemisia are not currently active.
When is pollen season in Hempstead, New York?
How often is the Hempstead, New York pollen forecast updated?
The Hempstead, New York pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Hempstead, New York 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 Hempstead, New York 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 Hempstead, New York, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
