Fontenay-sous-Bois pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Fontenay-sous-Bois 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 | 19/100 |
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 | 6/100 |
Local Environmental Conditions
Fontenay-sous-Bois' Bois de Vincennes fringe and the Marne River corridor feature plane, oak, and linden as the main tree pollen sources, with the Bois de Vincennes being a particularly significant local tree pollen source during spring. Exposure varies between the woodland edge and the densely built city centre, while surrounding Île-de-France farmland and the Marne valley contribute additional grass pollen.
Fontenay-sous-Bois' Bois de Vincennes fringe makes it one of the greener parts of the eastern Paris suburbs, with locally significant tree pollen during spring. Hazel and alder open from January before birch and plane peak through April and May, with grass peaking through June and July. The Marne valley channels airflows, while surrounding Île-de-France farmland adds additional exposure throughout the season.
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Frequently Asked Questions About Pollen in Île-de-France
Is pollen high in Fontenay-sous-Bois right now?
On 20 September 2026, overall pollen levels in Fontenay-sous-Bois are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Fontenay-sous-Bois tomorrow?
On 21 September 2026, pollen conditions in Fontenay-sous-Bois will be similar to today, with artemisia at low levels
Is pollen expected to decrease in Fontenay-sous-Bois this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Fontenay-sous-Bois?
On 20 September 2026, Artemisia is the dominant pollen source in Fontenay-sous-Bois. willow, cypress, and grass are not currently active.
When is pollen season in Fontenay-sous-Bois?
How often is the Fontenay-sous-Bois pollen forecast updated?
The Fontenay-sous-Bois pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Fontenay-sous-Bois 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 Fontenay-sous-Bois 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 Fontenay-sous-Bois, 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).
