Arlington, Massachusetts pollen forecast — Kensington Park Historic District neighborhood
Pollen Today
Today (20 September) pollen in Kensington Park Historic District, Arlington, Massachusetts is moderate; ragweed is moderate; grass is 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 | 16/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Moderate | 28/100 |
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 | 39/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 14/100 | |
| Ragweed (Ambrosia) | High | 51/100 |
Local Environmental Conditions
Here, nearby, hazel and willow line the water's edge, releasing pollen that carries easily on the wind. Here, in the surrounding area, the tree cover here leans heavily on oak and birch, both key drivers of spring pollen. This area, a short distance from here, has a green space of mown lawn and planted trees, both feeding into local grass and ragweed counts.
Near the bank, hazel and willow lead the seasonal calendar, topping out well before most other trees start releasing pollen, around February and March. Oak and birch in the woodland come next, through the heart of spring, cresting around April and May in the year's sharpest tree-pollen spike. Grass pollen counts rise through late spring, reaching their peak around June, and ragweed later takes the lead from mid-August through October.
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Frequently Asked Questions About Pollen in Massachusetts
Is pollen high in Arlington, Massachusetts right now?
On 20 September 2026, overall pollen levels in Arlington, Massachusetts are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Arlington, Massachusetts tomorrow?
On 21 September 2026, pollen conditions in Arlington, Massachusetts will be different from today, with artemisia at low levels and grass, ambrosia increasing
Is pollen expected to decrease in Arlington, 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 Arlington, Massachusetts?
On 20 September 2026, Ambrosia is the dominant pollen source in Arlington, Massachusetts. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Arlington, Massachusetts?
How often is the Arlington, Massachusetts pollen forecast updated?
The Arlington, Massachusetts pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Arlington, 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 Arlington, 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 Arlington, 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).
