São José dos Campos pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in São José dos Campos is moderate; cypress and willow are moderate.
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 | 48/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | Moderate | 39/100 |
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 | 48/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Moderate | 39/100 |
Local Environmental Conditions
São José dos Campos' parks feature eucalyptus, pine, and native Atlantic Forest species as the main tree pollen sources, with exposure varying between green areas and the more built-up city centre. Surrounding São Paulo state farmland and the Serra da Mantiqueira foothills contribute substantial tree and grass pollen throughout the year.
São José dos Campos' pollen season is most pronounced during the dry season from May to September, when eucalyptus, pine, and native Atlantic Forest species release pollen and grass exposure increases. The tropical highland climate means frequent rainfall during the wet summer suppresses dispersal, while the Serra da Mantiqueira foothills and the Paraíba do Sul valley channel pollen across the city during the dry season.
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Frequently Asked Questions About Pollen in São Paulo
Is pollen high in São José dos Campos right now?
On 20 September 2026, overall pollen levels in São José dos Campos are moderate. Willow is the main contributor to airborne pollen, while cypress remain at lower levels
Will pollen levels change in São José dos Campos tomorrow?
On 21 September 2026, pollen conditions in São José dos Campos will be similar to today, with willow at moderate levels, cypress at moderate levels
Is pollen expected to decrease in São José dos Campos this week?
According to the five-day outlook, willow and cypress pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in São José dos Campos?
On 20 September 2026, Willow is the dominant pollen source in São José dos Campos. cypress are also present but at lower levels. grass are not currently active.
When is pollen season in São José dos Campos?
How often is the São José dos Campos pollen forecast updated?
The São José dos Campos pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in São José dos Campos 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 José dos Campos 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 José dos Campos, 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).
