Osen kommune pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Osen kommune is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress and mugwort will increase; grass and willow 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) | Low | 1/100 |
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) | Low | 3/100 |
Local Environmental Conditions
Lying on the remote outer Trøndelag coast, Osen opens the pollen season with alder from March before birch peaks through May. Grass from surrounding coastal farmland peaks through June and July, while the Norwegian Sea coastal position means onshore winds can frequently disperse pollen and the subarctic Atlantic climate provides regular rainfall interruptions throughout the compressed spring and summer season.
The annual pollen season around Osen kommune spans March through August, with an early alder and hazel signal from about March, with birch building to the season's sharpest peak through to May. Grass pollen rounds out Osen kommune's season through June and July. With the glacier-fed valleys and heavy precipitation typical of this region, the local climate adds a distinct local flavour to how the wider Norwegian season plays out.
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Frequently Asked Questions About Pollen in Trøndelag
Is pollen high in Osen kommune right now?
On 20 September 2026, overall pollen levels in Osen kommune are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Osen kommune tomorrow?
On 21 September 2026, pollen conditions in Osen kommune will be similar to today, with artemisia at low levels
Is pollen expected to decrease in Osen kommune this week?
According to the five-day outlook, artemisia and cypress pollen levels will increase later in the week.
Which pollen types are currently active in Osen kommune?
On 20 September 2026, Artemisia is the dominant pollen source in Osen kommune. cypress, grass, and willow are not currently active.
When is pollen season in Osen kommune?
How often is the Osen kommune pollen forecast updated?
The Osen kommune pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Osen kommune 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 Osen kommune 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 Osen kommune, 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).
