Blois Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Blois is moderate; mold (cladosporium) is moderate; mold (alternaria) is low.
Pollen Tomorrow
Tomorrow (11 October 2026) mold (alternaria) remains low, mold (cladosporium) declining.
7-Day Trend
Over the next week mold (alternaria) and mold (cladosporium) will increase; cypress, grass, willow, and mugwort 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) | None | 0/100 |
| Mold (Alternaria) | Low | 12/100 |
| Mold (Cladosporium) | Moderate | 26/100 |
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 | 10/100 | |
| Mold (Cladosporium) | Low | 20/100 |
Local Environmental Conditions
The center of Blois is surrounded mainly by built-up land, which covers around 62% of the nearby area, with some woodland and open water. Oak is the most prominent allergenic tree nearby, with maple and willow also present. Grass pollen is plentiful, while plantain and pigweed lead among the weeds. Oak is unusually common here compared with most other locations, making it a particularly important local pollen source.
Tree pollen peaks in late spring, when the weather warms to around 15°C and oak, maple and willow are in full flower. Then come the grasses, strongest in early summer and fading by early fall. Later, plantain and pigweed keep weed pollen in the air from late spring into early fall. The oak period in late spring is usually the most intense time of year here.
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Frequently Asked Questions About Pollen in Centre-Val de Loire
Is pollen high in Blois right now?
Currently, there is no significant pollen in Blois.
Will pollen levels change in Blois tomorrow?
On 11 October 2026, pollen conditions in Blois will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Blois this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Blois?
On 10 October 2026, there are no significant pollen types in Blois.
When is pollen season in Blois?
How often is the Blois pollen forecast updated?
The Blois pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Blois 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 Blois 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 Blois, 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).
