Hardenberg pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Hardenberg is none
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort at low levels.
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) | 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) | Low | 5/100 |
Local Environmental Conditions
Hardenberg's Vecht River corridor and surrounding green spaces feature oak, birch, and alder as the main tree pollen sources, with exposure varying between these riverside areas and the more built-up town centre. Surrounding Overijssel farmland and the flat, open landscape contribute substantial grass and crop pollen, while the Vecht valley channels airflows and concentrates pollen across the town under prevailing westerly winds.
Hardenberg's pollen season runs from January through August, opening with hazel and alder from January before birch peaks through April and May. Grass pollen peaks through June and July. The Vecht River valley channels airflows and concentrates pollen, while surrounding Overijssel farmland extends substantial grass and crop pollen into August. The temperate oceanic climate means frequent rainfall provides regular interruptions throughout the season.
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Frequently Asked Questions About Pollen in Overijssel
Is pollen high in Hardenberg right now?
Currently, there is no significant pollen in Hardenberg.
Will pollen levels change in Hardenberg tomorrow?
On 21 September 2026, pollen conditions in Hardenberg will be different from today, with artemisia at low levels
Is pollen expected to decrease in Hardenberg this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Hardenberg?
On 20 September 2026, there are no significant pollen types in Hardenberg.
When is pollen season in Hardenberg?
How often is the Hardenberg pollen forecast updated?
The Hardenberg pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Hardenberg 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 Hardenberg 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 Hardenberg, 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).
