Fillan pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Fillan is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will decrease; cypress, 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) | Moderate | 32/100 |
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) | Moderate | 27/100 |
Local Environmental Conditions
Fillan is a small Trøndelag coastal village in Hitra municipality on the Hitra island on the outer Trøndelag coast where birch, alder, and island coastal grassland are the main local pollen sources. The Norwegian Sea island position means strong onshore winds very frequently disperse pollen, while the subarctic Atlantic climate produces a compressed season with birch peaking through May before grass contributes through June and July throughout this outer Trøndelag island community.
Fillan moves through a pollen season that runs from March through August, with alder and hazel setting things in motion as early as March, before the season's main birch surge arrives which carries through May. The season then shifts to grass pollen for June and July. With the fertile lowlands surrounding the Trondheimsfjord near Fillan, 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 Trøndelag
Is pollen high in Fillan right now?
On 20 September 2026, overall pollen levels in Fillan are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Fillan tomorrow?
On 21 September 2026, pollen conditions in Fillan will be similar to today, with artemisia at moderate levels
Is pollen expected to decrease in Fillan this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Fillan?
On 20 September 2026, Artemisia is the dominant pollen source in Fillan. willow, cypress, and grass are not currently active.
When is pollen season in Fillan?
How often is the Fillan pollen forecast updated?
The Fillan pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Fillan 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 Fillan 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 Fillan, 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. |
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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).
