Maisons-Alfort pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Maisons-Alfort is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will increase; cypress, grass, and willow will remain stable.
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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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 15/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Low | 1/100 |
Local Environmental Conditions
Maisons-Alfort's Marne and Seine river confluence green spaces feature plane, oak, and linden as the main tree pollen sources, with exposure varying between these areas and the densely built suburban landscape. As part of the greater Paris metropolitan area, the river confluence channels airflows from multiple directions, while surrounding Île-de-France farmland contributes additional grass and tree pollen throughout the season.
Maisons-Alfort's position at the Marne and Seine confluence channels airflows from multiple directions through the eastern Paris suburbs. Hazel and alder open from January before birch and plane peak through April and May, with grass from surrounding Île-de-France farmland peaking through June and July. The river confluence setting and urban heat island extend the season compared to outer areas.
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Frequently Asked Questions About Pollen in Île-de-France
Is pollen high in Maisons-Alfort right now?
On 20 September 2026, overall pollen levels in Maisons-Alfort are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Maisons-Alfort tomorrow?
On 21 September 2026, pollen conditions in Maisons-Alfort will be similar to today, with artemisia at low levels
Is pollen expected to decrease in Maisons-Alfort this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Maisons-Alfort?
On 20 September 2026, Artemisia is the dominant pollen source in Maisons-Alfort. grass, willow, and cypress are not currently active.
When is pollen season in Maisons-Alfort?
How often is the Maisons-Alfort pollen forecast updated?
The Maisons-Alfort pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Maisons-Alfort 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 Maisons-Alfort 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 Maisons-Alfort, 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).
