Le Mans Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Le Mans is low; mugwort, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) mold (alternaria) remains low, mold (cladosporium) remains low, mugwort no longer expected.
7-Day Trend
Over the next week mugwort and mold (alternaria) will increase; mold (cladosporium) will decrease; cypress, grass, and willow will remain stable.
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Pollen Risk
Today - 10 October
| 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 | 5/100 |
| Mold (Alternaria) | Low | 8/100 |
| Mold (Cladosporium) | Low | 19/100 |
Tomorrow - 11 October
| 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 | |
| Mold (Alternaria) | Low | 7/100 | |
| Mold (Cladosporium) | Low | 16/100 |
Local Environmental Conditions
The landscape around the heart of Le Mans is densely built up, with some woodland. Close to the Sarthe River, riverside trees such as willow, poplar and alder add to local tree pollen. Allergenic trees nearby include oak, hazel and maple. Grass pollen is plentiful, while plantain and pigweed lead among the weeds.
The pollen year starts in late winter, when hazel flowers. Tree pollen peaks in late spring, when the weather warms to around 15°C and oak and maple are in full flower. Grasses take over in early summer, with temperatures around 20°C, and their pollen lingers into late summer. Plantain and pigweed bring a final peak from late spring into early fall. By early winter, pollen levels are low again.
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Frequently Asked Questions About Pollen in Pays de la Loire
Is pollen high in Le Mans right now?
On 10 October 2026, overall pollen levels in Le Mans are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Le Mans tomorrow?
On 11 October 2026, pollen conditions in Le Mans will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Le Mans this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Le Mans?
On 10 October 2026, Artemisia is the dominant pollen source in Le Mans. cypress, grass, and willow are not currently active.
When is pollen season in Le Mans?
How often is the Le Mans pollen forecast updated?
The Le Mans pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Le Mans 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 Le Mans 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 Le Mans, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
