Belchertown pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Belchertown 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 | 9/100 |
| 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 | 37/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 18/100 | |
| Ragweed (Ambrosia) | Moderate | 47/100 |
Local Environmental Conditions
Located within the neighborhood, this area has the water's edge is thick with hazel and willow, whose pollen spreads readily in early spring. Located close to home here, this area has a stand of oak and birch, the latter ranked among the region's most potent tree allergens. Nearby, just outside the immediate area, well-kept lawns and ornamental trees in this park add their share of grass and ragweed pollen.
Hazel and willow near the water open the pollen calendar early, climbing steadily from late winter into March. The area's oak and birch trees pollinate through mid-to-late spring, usually hitting its highest point sometime between mid-April and mid-May. Through late spring, grass pollen climbs steadily toward its June peak, then yields to ragweed, the dominant late-summer and fall allergen through October.
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Resource Hub
Pollen forecast neighborhoods 3 neighborhoods
Sports venues in Belchertown 2 sports venues
Frequently Asked Questions About Pollen in Massachusetts
Is pollen high in Belchertown right now?
On 20 September 2026, overall pollen levels in Belchertown are low. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels
Will pollen levels change in Belchertown tomorrow?
On 21 September 2026, pollen conditions in Belchertown will be different from today, with artemisia at low levels and grass, ambrosia increasing
Is pollen expected to decrease in Belchertown 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 Belchertown?
On 20 September 2026, Grass is the dominant pollen source in Belchertown. ambrosia are also present but at lower levels. artemisia are not currently active.
When is pollen season in Belchertown?
How often is the Belchertown pollen forecast updated?
The Belchertown pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Belchertown 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 Belchertown 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 Belchertown, 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).
