Walpole pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Walpole is moderate; grass and ragweed are moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains moderate, 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) | Moderate | 27/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Moderate | 34/100 |
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 | 46/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 14/100 | |
| Ragweed (Ambrosia) | High | 53/100 |
Local Environmental Conditions
In Walpole, this area, in the surrounding area, has hazel and willow cluster near the water, an early and reliable source of allergenic pollen. This area, in the vicinity, has a wooded area built around oak and birch, both contributing heavily to the region's spring pollen totals. Here, just outside the immediate area, grass and ornamental trees within the park boundary contribute modestly to grass and ragweed levels.
Around Walpole, the woodland's oak and birch trees become the main pollen source by mid-spring, typically landing in April and May. Water-edge hazel and willow are usually the first allergenic trees active here, usually peaking sometime between late winter and the end of March. Grass pollen becomes the dominant allergen through late spring, peaking in June, and ragweed later takes the lead from mid-August through October.
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Sports venues in Walpole 2 sports venues
Frequently Asked Questions About Pollen in Massachusetts
Is pollen high in Walpole right now?
On 20 September 2026, overall pollen levels in Walpole are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Walpole tomorrow?
On 21 September 2026, pollen conditions in Walpole will be different from today, with artemisia at low levels, grass at moderate levels and ambrosia increasing
Is pollen expected to decrease in Walpole this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Walpole?
On 20 September 2026, Ambrosia is the dominant pollen source in Walpole. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Walpole?
How often is the Walpole pollen forecast updated?
The Walpole pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Walpole 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 Walpole 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 Walpole, 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. |
Get More in the Airmine Pollen app
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).
