Passau pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Passau 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 | 4/100 |
| 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
Around Passau, maple, linden, and birch stand out as the leading tree pollen sources in parks and gardens, with exposure shifting between green space and centre. Additional tree and grass pollen comes from Bavarian Alpine foreland farmland and spruce woodland surrounding the town, while the alpine foreland setting delays the pollen season slightly.
Passau's pollen season continues from January through August, launched by hazel and alder from late January before birch peaking through April and May. Grass pollen peaks next, running through June and July. The town sits at the edge of the Bavarian Alps, where alpine meadow and forest dominate the surrounding terrain, contributing mountain grass and conifer pollen into midsummer.
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Frequently Asked Questions About Pollen in Bavaria
Is pollen high in Passau right now?
On 20 September 2026, overall pollen levels in Passau are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Passau tomorrow?
On 21 September 2026, pollen conditions in Passau will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Passau this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Passau?
On 20 September 2026, Grass is the dominant pollen source in Passau. cypress, willow, and artemisia are not currently active.
When is pollen season in Passau?
How often is the Passau pollen forecast updated?
The Passau pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Passau 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 Passau 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 Passau, 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).
