Rapperswil-Jona pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Rapperswil-Jona 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 | 11/100 |
| 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
Rapperswil-Jona's Lake Zürich shoreline setting features oak, linden, and rose-garden vegetation as pollen sources, with exposure varying between the lakeside rose gardens and the built-up historic town centre. Lake breezes moderate pollen timing.
Hazel and alder kick off the season at Rapperswil-Jona in January, and once birch peaks through April, oak and ash take over before grass claims June and July. River valleys and surrounding foothills here channel airflows and can concentrate pollen under calm conditions, while nearby farmland adds substantial tree and grass exposure.
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Frequently Asked Questions About Pollen in Sankt Gallen
Is pollen high in Rapperswil-Jona right now?
On 20 September 2026, overall pollen levels in Rapperswil-Jona are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Rapperswil-Jona tomorrow?
On 21 September 2026, pollen conditions in Rapperswil-Jona will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Rapperswil-Jona this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Rapperswil-Jona?
On 20 September 2026, Grass is the dominant pollen source in Rapperswil-Jona. artemisia, cypress, and willow are not currently active.
When is pollen season in Rapperswil-Jona?
How often is the Rapperswil-Jona pollen forecast updated?
The Rapperswil-Jona pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rapperswil-Jona 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 Rapperswil-Jona 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 Rapperswil-Jona, 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).
