Rennebu kommune pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Rennebu kommune is high; mugwort is high.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort declining.
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) | High | 53/100 |
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 | 47/100 |
Local Environmental Conditions
Lying in the Orkla valley east of the Dovrefjell, Rennebu opens the pollen season with alder from February before birch peaks through April and May. Grass from surrounding farmland peaks through June and July before mugwort extends exposure into September. The Orkla valley concentrates pollen under calm conditions, while the Atlantic-influenced but increasingly continental inland climate produces a well-defined seasonal progression throughout.
The yearly pollen cycle in Rennebu kommune runs its course from March to August, starting quietly with alder and hazel already by March, before birch pollen takes hold most strongly before easing after May. From there, grass pollen continues across June and July. With the broad agricultural plains typical of this part of Trøndelag, the local climate means pollen levels here don't always follow the national pattern exactly.
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Frequently Asked Questions About Pollen in Trøndelag
Is pollen high in Rennebu kommune right now?
On 20 September 2026, overall pollen levels in Rennebu kommune are high. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Rennebu kommune tomorrow?
On 21 September 2026, pollen conditions in Rennebu kommune will be different from today, with artemisia continuing to decline
Is pollen expected to decrease in Rennebu kommune 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 Rennebu kommune?
On 20 September 2026, Artemisia is the dominant pollen source in Rennebu kommune. grass, willow, and cypress are not currently active.
When is pollen season in Rennebu kommune?
How often is the Rennebu kommune pollen forecast updated?
The Rennebu kommune pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rennebu 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 Rennebu 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 Rennebu 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. |
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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).
