Årnes, Trøndelag pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Årnes, Trøndelag is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will increase; 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) | Low | 2/100 |
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 | 1/100 |
Local Environmental Conditions
Årnes in Trøndelag is a small village in Snåsa municipality in the Snåsa valley where birch, alder, and valley farmland vegetation are the main local pollen sources. The Snåsavatnet lake proximity moderates local temperatures, while the Atlantic-influenced Trøndelag climate provides frequent rainfall interruptions and birch peaks through April and May before grass from surrounding Snåsa farmland contributes through June and July throughout this Namdalen community.
Årnes typically experiences a pollen season that begins in March and continues through August, with alder and hazel arriving first already by March, before birch surges to its highest levels through May. From there, grass pollen continues into the following June and July. With the fertile lowlands surrounding the Trondheimsfjord near Årnes, the local climate makes the season feel a little different here than the national average suggests.
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Frequently Asked Questions About Pollen in Trøndelag
Is pollen high in Årnes, Trøndelag right now?
On 20 September 2026, overall pollen levels in Årnes, Trøndelag are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Årnes, Trøndelag tomorrow?
On 21 September 2026, pollen conditions in Årnes, Trøndelag will be similar to today, with artemisia at low levels
Is pollen expected to decrease in Årnes, Trøndelag this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Årnes, Trøndelag?
On 20 September 2026, Artemisia is the dominant pollen source in Årnes, Trøndelag. cypress, grass, and willow are not currently active.
When is pollen season in Årnes, Trøndelag?
How often is the Årnes, Trøndelag pollen forecast updated?
The Årnes, Trøndelag pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Årnes, Trøndelag 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 Årnes, Trøndelag 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 Årnes, Trøndelag, 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).
