Dos Hermanas pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Dos Hermanas is high; mugwort is high; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
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) | Low | 4/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | High | 70/100 |
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 | 1/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | High | 70/100 |
Local Environmental Conditions
Dos Hermanas' green spaces and the Guadalquivir River corridor feature olive, orange, and eucalyptus as the main tree pollen sources, with exposure varying between these areas and the more built-up suburban city centre. Surrounding Andalusian farmland and the Doñana National Park contribute substantial grass and tree pollen, while the hot, dry Mediterranean climate concentrates pollen dispersal during the spring season.
Dos Hermanas' pollen season opens in January with olive and orange before grass from surrounding Andalusian farmland and Doñana National Park peaks through April and May. The flat, open Sevillian plain allows pollen to disperse widely, while the hot, dry Mediterranean summer ends the season abruptly and olive is a particularly significant spring pollen source across the area.
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Frequently Asked Questions About Pollen in Andalusia
Is pollen high in Dos Hermanas right now?
On 20 September 2026, overall pollen levels in Dos Hermanas are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Dos Hermanas tomorrow?
On 21 September 2026, pollen conditions in Dos Hermanas will be similar to today, with grass at low levels, artemisia at high levels
Is pollen expected to decrease in Dos Hermanas this week?
According to the five-day outlook, grass and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Dos Hermanas?
On 20 September 2026, Artemisia is the dominant pollen source in Dos Hermanas. grass are also present but at lower levels. willow and cypress are not currently active.
When is pollen season in Dos Hermanas?
How often is the Dos Hermanas pollen forecast updated?
The Dos Hermanas pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Dos Hermanas 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 Dos Hermanas 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 Dos Hermanas, 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).
