Rosendal pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Rosendal is none
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, grass, 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) | None | 0/100 |
| 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
Rosendal is a small Vestland village in Kvinnherad municipality on the Hardangerfjord at the foot of the Folgefonna glacier where birch, hazel, and fjordside orchard vegetation are the main local pollen sources. The Hardangerfjord position means onshore winds can periodically disperse pollen, while the Atlantic-influenced Hardanger climate provides frequent rainfall interruptions and birch peaks through April and May before grass and orchard vegetation contribute through June and July.
The yearly pollen cycle in Rosendal runs its course from March to August, with the first releases of alder and hazel starting around March, before a strong birch peak sets in lasting through May. The season then shifts to grass pollen through the summer months of June and July. With the glacier-fed valleys and heavy precipitation typical of this region, the local climate adds its own local variation on top of the general national pattern.
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Frequently Asked Questions About Pollen in Vestland
Is pollen high in Rosendal right now?
Currently, there is no significant pollen in Rosendal.
Will pollen levels change in Rosendal tomorrow?
On 21 September 2026, pollen conditions in Rosendal will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Rosendal this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Rosendal?
On 20 September 2026, there are no significant pollen types in Rosendal.
When is pollen season in Rosendal?
How often is the Rosendal pollen forecast updated?
The Rosendal pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rosendal 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 Rosendal 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 Rosendal, 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).
