Thun pollen forecast — Innere Stadt Thun neighborhood
Pollen Today
Today (20 September) pollen in Innere Stadt Thun, Thun is low; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass no longer expected.
7-Day Trend
Over the next week grass will increase; cypress, willow, and mugwort 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) | Low | 12/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
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
Innere Stadt Thun features linden and chestnut trees along the Aare riverside as the main pollen sources, with exposure concentrated in Thun's historic old-town core beneath its hilltop castle.
Early January brings hazel and alder to Innere Stadt Thun, birch follows with a peak strongly through April, oak and ash extend the tree season, and grass then peaks through June and July. This stretch of the Aare valley tends to funnel air, occasionally trapping pollen, while the surrounding farmland and forested rises keep contributing through summer. The elevated setting means the season begins slightly later than in lower-lying Swiss cities.
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Resource Hub
Pollen forecast neighborhoods 2 neighborhoods
Sports venues in Thun 1 sports venue
Frequently Asked Questions About Pollen in Bern
Is pollen high in Thun right now?
On 20 September 2026, overall pollen levels in Thun are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Thun tomorrow?
On 21 September 2026, pollen conditions in Thun will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Thun this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Thun?
On 20 September 2026, Grass is the dominant pollen source in Thun. artemisia, cypress, and willow are not currently active.
When is pollen season in Thun?
How often is the Thun pollen forecast updated?
The Thun pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Thun 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 Thun 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 Thun, 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).
