Teresina pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Teresina is none
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, grass, and willow will remain stable.
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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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 |
Local Environmental Conditions
Teresina's semi-arid tropical setting features native Caatinga species including carnaúba palm and aroeira as the main tree pollen sources, with exposure varying between green areas and the more built-up city centre. Surrounding scrubland and the Parnaíba River corridor contribute substantial grass and scrub pollen, with the dry season from June to November concentrating pollen dispersal.
Teresina's pollen season is highest during the dry season from June to November, when native Caatinga species including carnaúba palm and aroeira release pollen alongside grass from urban green spaces. The wet season from December to May brings frequent rainfall that suppresses dispersal, while the semi-arid tropical climate means the dry season concentrates pollen production and dispersal across the surrounding scrubland.
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Frequently Asked Questions About Pollen in Piauí
Is pollen high in Teresina right now?
Currently, there is no significant pollen in Teresina.
Will pollen levels change in Teresina tomorrow?
On 21 September 2026, pollen conditions in Teresina will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Teresina this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Teresina?
On 20 September 2026, there are no significant pollen types in Teresina.
When is pollen season in Teresina?
How often is the Teresina pollen forecast updated?
The Teresina pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Teresina 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 Teresina 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 Teresina, 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).
