Uithoorn pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Uithoorn is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort increasing.
7-Day Trend
Over the next week grass and mugwort will increase; cypress 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 | 9/100 |
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 | 35/100 |
Local Environmental Conditions
Local tree pollen in Uithoorn traces mainly to oak, birch, and linden in parks and gardens, with exposure differing between the more built-up centre and the greener outskirts. the Amstel and Drechtdijk polder and the surrounding Noord-Holland farmland add substantial grass and tree pollen to the mix, especially given Uithoorn's role as a riverside town south of Amsterdam.
Uithoorn sees its first pollen of the year from hazel and alder in January, with birch taking the lead through April and the season extending to August. Oak and ash pollen build through April and May, handing off to grass as the leading source in June and July. How pollen settles around Uithoorn owes something to the Amstel and Drechtdijk polder, with the Amstelland peat meadow landscape shaping conditions further.
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Frequently Asked Questions About Pollen in Noord-Holland
Is pollen high in Uithoorn right now?
On 20 September 2026, overall pollen levels in Uithoorn are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Uithoorn tomorrow?
On 21 September 2026, pollen conditions in Uithoorn will be different from today, with artemisia increasing
Is pollen expected to decrease in Uithoorn this week?
According to the five-day outlook, artemisia and grass pollen levels will increase later in the week.
Which pollen types are currently active in Uithoorn?
On 20 September 2026, Artemisia is the dominant pollen source in Uithoorn. cypress, grass, and willow are not currently active.
When is pollen season in Uithoorn?
How often is the Uithoorn pollen forecast updated?
The Uithoorn pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Uithoorn 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 Uithoorn 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 Uithoorn, 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).
