Brookfield, Massachusetts pollen forecast — Brookfield Common Historic District neighborhood
Pollen Today
Today (20 September) pollen in Brookfield Common Historic District, Brookfield, Massachusetts is low; grass and ragweed are low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass increasing, ragweed increasing, mugwort at low levels.
7-Day Trend
Over the next week grass, mugwort, and 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) | Low | 5/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Low | 18/100 |
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 | 33/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 17/100 | |
| Ragweed (Ambrosia) | Moderate | 46/100 |
Local Environmental Conditions
Here, not far from here, a waterway supports hazel and willow along its bank, both strongly allergenic wind-pollinated species. This area, in the wider area, has a park whose turf grass and ornamental plantings feed local grass and ragweed pollen levels. Year-to-year swings in rainfall and wind can shift this picture somewhat either way.
Hazel and willow by the water are typically first out of the gate, usually the first pollen source active, peaking sometime in February or March. Late spring brings rising grass pollen that crests in June, and ragweed later takes the lead from mid-August through October. Local weather swings can shift these windows slightly, but the overall order tends to hold.
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Frequently Asked Questions About Pollen in Massachusetts
Is pollen high in Brookfield, Massachusetts right now?
On 20 September 2026, overall pollen levels in Brookfield, Massachusetts are low. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels
Will pollen levels change in Brookfield, Massachusetts tomorrow?
On 21 September 2026, pollen conditions in Brookfield, Massachusetts will be different from today, with artemisia at low levels and grass, ambrosia increasing
Is pollen expected to decrease in Brookfield, Massachusetts this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Brookfield, Massachusetts?
On 20 September 2026, Grass is the dominant pollen source in Brookfield, Massachusetts. ambrosia are also present but at lower levels. artemisia are not currently active.
When is pollen season in Brookfield, Massachusetts?
How often is the Brookfield, Massachusetts pollen forecast updated?
The Brookfield, Massachusetts pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Brookfield, Massachusetts 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 Brookfield, Massachusetts 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 Brookfield, Massachusetts, 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).
