Évry pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Évry is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort no longer expected.
7-Day Trend
Over the next week mugwort will increase; cypress, grass, and willow will remain stable.
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Features and forecast availability vary by region.
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 | 8/100 |
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) | None | 0/100 |
Local Environmental Conditions
Évry's Parc aux Lièvres and the Seine River corridor feature oak, plane, and linden as the main tree pollen sources, with exposure varying between these green areas and the more built-up new town areas. Surrounding Essonne farmland and the Forêt de Sénart contribute substantial tree and grass pollen, while the Seine valley channels airflows and concentrates pollen across the new town under prevailing westerly winds.
Évry's Seine valley new town position channels airflows through the southern Paris region. Hazel and alder open from January before birch and plane peak through April and May, with grass from surrounding Essonne farmland and the Forêt de Sénart peaking through June and July. The dry regional climate means fewer rainfall interruptions than in Atlantic-facing cities throughout the season.
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Frequently Asked Questions About Pollen in Île-de-France
Is pollen high in Évry right now?
On 20 September 2026, overall pollen levels in Évry are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Évry tomorrow?
On 21 September 2026, pollen conditions in Évry will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Évry this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Évry?
On 20 September 2026, Artemisia is the dominant pollen source in Évry. cypress, grass, and willow are not currently active.
When is pollen season in Évry?
How often is the Évry pollen forecast updated?
The Évry pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Évry 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 Évry 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 Évry, 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).
