Sertãozinho pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Sertãozinho is low; cypress and willow are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress will increase; 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) | Low | 12/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | Low | 13/100 |
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) | Low | 6/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Low | 12/100 |
Local Environmental Conditions
Sertãozinho lies in the northeastern São Paulo sugarcane and ethanol industry region, where eucalyptus, sugarcane crop vegetation, and native cerrado remnants are the main pollen sources. The tropical highland climate produces a more defined pollen season, with the dry season from May to September concentrating pollen dispersal and the wet season bringing frequent rainfall interruptions throughout this important São Paulo sugarcane and ethanol municipality.
The driest stretch in Sertãozinho, May to September, brings the heaviest pollen exposure as sugarcane crop vegetation and native cerrado remnants pollen circulates without rain to interrupt it, before wetter weather resumes and washes much of it from the air.
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Frequently Asked Questions About Pollen in São Paulo
Is pollen high in Sertãozinho right now?
On 20 September 2026, overall pollen levels in Sertãozinho are low. Willow is the main contributor to airborne pollen, while cypress remain at lower levels
Will pollen levels change in Sertãozinho tomorrow?
On 21 September 2026, pollen conditions in Sertãozinho will be similar to today, with willow at low levels, cypress at low levels
Is pollen expected to decrease in Sertãozinho this week?
According to the five-day outlook, willow pollen levels are expected to gradually decrease, while cypress pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Sertãozinho?
On 20 September 2026, Willow is the dominant pollen source in Sertãozinho. cypress are also present but at lower levels. grass are not currently active.
When is pollen season in Sertãozinho?
How often is the Sertãozinho pollen forecast updated?
The Sertãozinho pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Sertãozinho 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 Sertãozinho 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 Sertãozinho, 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).
