Colmenar Viejo pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Colmenar Viejo is low; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass will decrease; cypress, 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) | Low | 12/100 |
| 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) | Low | 11/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | None | 0/100 |
Local Environmental Conditions
Colmenar Viejo's Sierra de Guadarrama foothills setting and the Manzanares River headwaters feature oak, pine, and ash as the main tree pollen sources, with the Guadarrama woodland and heathland particularly significant locally. Surrounding Madrid regional farmland extends grass pollen, while the elevated setting creates distinct pollen patterns compared to lower-lying areas of the Madrid metropolitan region.
Colmenar Viejo's Sierra de Guadarrama foothills setting makes it one of the more tree-pollen-significant Madrid suburban locations. Hazel and pine open from February before oak peaks strongly through April. Grass from surrounding Madrid regional farmland peaks through May and June before mugwort and nettle extend exposure into September, while the elevated woodland setting produces more intense local tree pollen than lower metropolitan areas.
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Frequently Asked Questions About Pollen in Madrid
Is pollen high in Colmenar Viejo right now?
On 20 September 2026, overall pollen levels in Colmenar Viejo are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Colmenar Viejo tomorrow?
On 21 September 2026, pollen conditions in Colmenar Viejo will be similar to today, with grass at low levels
Is pollen expected to decrease in Colmenar Viejo this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Colmenar Viejo?
On 20 September 2026, Grass is the dominant pollen source in Colmenar Viejo. artemisia, cypress, and willow are not currently active.
When is pollen season in Colmenar Viejo?
How often is the Colmenar Viejo pollen forecast updated?
The Colmenar Viejo pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Colmenar Viejo 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 Colmenar Viejo 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 Colmenar Viejo, 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).
