São Domingos de Rana pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in São Domingos de Rana 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 mugwort will increase; grass will decrease; cypress and willow will remain stable.
Explore Forecasts
Air Quality
Pollen in Other Cities
Air Quality in Other Cities
Get More in Our App
Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
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 | 8/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | High | 67/100 |
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 | 61/100 |
Local Environmental Conditions
Located on the Lisbon coastal plain near Cascais, São Domingos de Rana in Lisboa draws most of its tree pollen from oak and plane, while grass pollen contributes further exposure as the season progresses. Green spaces close to the built-up centre see noticeably different totals than the more open outskirts nearby, where surrounding farmland and woodland add their own seasonal contribution to the mix.
hazel and alder opens the pollen season in São Domingos de Rana as early as January, with oak and plane building through the following weeks before grass pollen carries exposure into early summer; the overall window runs January to August. Mediterranean summer drought keeps late-season pollen modest here. Conditions on the Lisbon coastal plain near Cascais shape how quickly pollen disperses once the peak has passed.
Get pollen & AQ on Strava
Follow your environmental exposure and performance with the free Airmine-Strava integration. See your pollen and air quality exposure for every Strava activity.
Resource Hub
Frequently Asked Questions About Pollen in Lisboa
Is pollen high in São Domingos de Rana right now?
On 20 September 2026, overall pollen levels in São Domingos de Rana are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in São Domingos de Rana tomorrow?
On 21 September 2026, pollen conditions in São Domingos de Rana will be similar to today, with grass at low levels, artemisia at high levels
Is pollen expected to decrease in São Domingos de Rana this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, while artemisia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in São Domingos de Rana?
On 20 September 2026, Artemisia is the dominant pollen source in São Domingos de Rana. grass are also present but at lower levels. cypress and willow are not currently active.
When is pollen season in São Domingos de Rana?
How often is the São Domingos de Rana pollen forecast updated?
The São Domingos de Rana pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in São Domingos de Rana 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 São Domingos de Rana 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 São Domingos de Rana, 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).
