Härnösand pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Härnösand 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
Härnösand relies on spruce, birch, and oak in its parks and green belts as the principal tree pollen sources. Wherever farmland meets the mouth of the Ångermanälven river, grass and crop pollen tend to disperse over a wide area. Forestry and public administration plays little role in vegetation-driven pollen here, which is shaped instead by the surrounding countryside.
Härnösand sees a delayed but intense pollen season, starting with alder in March and building to a compact birch peak by June. June and July then belong to grass pollen, which builds steadily as birch fades. Because of its position near the mouth of the Ångermanälven river, Härnösand experiences pollen dispersal patterns that shift with the local wind direction. What keeps the season going into August here is largely the surrounding spruce forest and open agricultural land.
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Frequently Asked Questions About Pollen in Västernorrland
Is pollen high in Härnösand right now?
Currently, there is no significant pollen in Härnösand.
Will pollen levels change in Härnösand tomorrow?
On 21 September 2026, pollen conditions in Härnösand will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Härnösand this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Härnösand?
On 20 September 2026, there are no significant pollen types in Härnösand.
When is pollen season in Härnösand?
How often is the Härnösand pollen forecast updated?
The Härnösand pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Härnösand 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 Härnösand 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 Härnösand, 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).
