São Paulo pollen forecast — Serra da Cantareira & Mairiporã neighborhood
Pollen Today
Today (20 September) pollen in Serra da Cantareira & Mairiporã, São Paulo is moderate; cypress is moderate; willow is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress and willow will decrease; grass 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) | Moderate | 35/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | Low | 25/100 |
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) | Moderate | 35/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Low | 25/100 |
Local Environmental Conditions
São Paulo Serra da Cantareira & Mairiporã features native Atlantic Forest species, eucalyptus, and highland cerradão woodland as the main pollen sources across this northern São Paulo metropolitan forest and highland transition zone. The Cantareira highlands concentrate pollen under valley conditions, with the dry season from May to September concentrating pollen dispersal throughout this important northern São Paulo metropolitan green corridor.
Serra da Cantareira & Mairiporã's pollen season concentrates during the dry period from May to September, when native Atlantic Forest species and highland cerradão woodland pollen disperses most readily; rainfall returns for the rest of the year and interrupts pollen counts.
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Frequently Asked Questions About Pollen in São Paulo
Is pollen high in São Paulo right now?
On 20 September 2026, overall pollen levels in São Paulo are moderate. Cypress is the main contributor to airborne pollen, while willow remain at lower levels
Will pollen levels change in São Paulo tomorrow?
On 21 September 2026, pollen conditions in São Paulo will be similar to today, with cypress at moderate levels, willow at low levels
Is pollen expected to decrease in São Paulo this week?
According to the five-day outlook, cypress and willow pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in São Paulo?
On 20 September 2026, Cypress is the dominant pollen source in São Paulo. willow are also present but at lower levels. grass are not currently active.
When is pollen season in São Paulo?
How often is the São Paulo pollen forecast updated?
The São Paulo pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in São Paulo 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 Paulo 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 Paulo, 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).
