Ribeirão Prêto pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Ribeirão Prêto 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 | 8/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | Low | 17/100 |
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 | 3/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Low | 15/100 |
Local Environmental Conditions
Ribeirão Prêto's parks feature eucalyptus, pine, and native Cerrado species as the main tree pollen sources, with exposure varying between green areas and the more built-up city centre. Surrounding São Paulo state sugarcane farmland and Cerrado remnants contribute substantial grass and crop pollen, with the dry season from May to September concentrating pollen dispersal.
Ribeirão Prêto's pollen season is most pronounced during the dry season from May to September, when eucalyptus, pine, and native Cerrado species release pollen and grass exposure from surrounding sugarcane farmland increases significantly. The hot, dry season concentrates pollen production and dispersal, while the wet summer from October to March brings frequent rainfall that suppresses exposure across the city.
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Frequently Asked Questions About Pollen in São Paulo
Is pollen high in Ribeirão Prêto right now?
On 20 September 2026, overall pollen levels in Ribeirão Prêto are low. Cypress is the main contributor to airborne pollen, while willow remain at lower levels
Will pollen levels change in Ribeirão Prêto tomorrow?
On 21 September 2026, pollen conditions in Ribeirão Prêto will be similar to today, with cypress at low levels, willow at low levels
Is pollen expected to decrease in Ribeirão Prêto 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 Ribeirão Prêto?
On 20 September 2026, Cypress is the dominant pollen source in Ribeirão Prêto. willow are also present but at lower levels. grass are not currently active.
When is pollen season in Ribeirão Prêto?
How often is the Ribeirão Prêto pollen forecast updated?
The Ribeirão Prêto pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Ribeirão Prêto 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 Ribeirão Prêto 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 Ribeirão Prêto, 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).
