Vila Franca de Xira pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Vila Franca de Xira is high; mugwort is high.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
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) | High | 69/100 |
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) | High | 64/100 |
Local Environmental Conditions
Vila Franca de Xira's parks and the Tagus River corridor oak and eucalyptus are the dominant tree species, with grass from Lisboa farmland building across spring. Regular Atlantic rainfall keeps pollen from accumulating for long.
Exposure in Vila Franca de Xira tracks oak and eucalyptus through the cooler months and grass through spring, with the region's frequent Atlantic rain keeping counts in check across January to June. Mugwort and nettle can extend exposure into early autumn in more sheltered inland spots.
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Frequently Asked Questions About Pollen in Lisboa
Is pollen high in Vila Franca de Xira right now?
On 20 September 2026, overall pollen levels in Vila Franca de Xira are high. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Vila Franca de Xira tomorrow?
On 21 September 2026, pollen conditions in Vila Franca de Xira will be similar to today, with artemisia at high levels
Is pollen expected to decrease in Vila Franca de Xira this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Vila Franca de Xira?
On 20 September 2026, Artemisia is the dominant pollen source in Vila Franca de Xira. cypress, grass, and willow are not currently active.
When is pollen season in Vila Franca de Xira?
How often is the Vila Franca de Xira pollen forecast updated?
The Vila Franca de Xira pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Vila Franca de Xira 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 Vila Franca de Xira 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 Vila Franca de Xira, 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. |
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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).
