Trois-Pistoles Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Trois-Pistoles is low; ragweed, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) mold (alternaria) remains low, mold (cladosporium) remains low, ragweed increasing, mugwort at low levels.
7-Day Trend
Over the next week mugwort, ragweed, mold (alternaria), and mold (cladosporium) will decrease; grass 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 |
| Ragweed (Ambrosia) | Low | 2/100 |
| Mold (Alternaria) | Low | 2/100 |
| Mold (Cladosporium) | Low | 9/100 |
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) | Low | 24/100 | |
| Ragweed (Ambrosia) | Moderate | 34/100 | |
| Mold (Alternaria) | Low | 8/100 | |
| Mold (Cladosporium) | Low | 19/100 |
Local Environmental Conditions
Woodland and open grassland share the area around the center of Trois-Pistoles, plus some built-up land. With the Lawrence River nearby, riverside vegetation along its banks contributes to the local mix. So much tree cover makes trees an important source of pollen locally. Grass pollen adds noticeably to the overall load.
Flowering trees bring the first pollen of the year in late spring. Grasses take over in midsummer and keep pollen in the air into late summer. Weeds on open ground add a smaller late peak from midsummer into mid-fall. By late fall, as temperatures fall to around freezing, pollen levels are low again.
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Frequently Asked Questions About Pollen in Quebec
Is pollen high in Trois-Pistoles right now?
On 10 October 2026, overall pollen levels in Trois-Pistoles are low. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Trois-Pistoles tomorrow?
On 11 October 2026, pollen conditions in Trois-Pistoles will be different from today, with artemisia at low levels and ambrosia increasing
Is pollen expected to decrease in Trois-Pistoles this week?
According to the five-day outlook, artemisia and ambrosia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Trois-Pistoles?
On 10 October 2026, Ambrosia is the dominant pollen source in Trois-Pistoles. artemisia and grass are not currently active.
When is pollen season in Trois-Pistoles?
How often is the Trois-Pistoles pollen forecast updated?
The Trois-Pistoles pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Trois-Pistoles 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 Trois-Pistoles 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 Trois-Pistoles, 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).
