Curitiba pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Curitiba is low; cypress is low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress remains low, willow at low levels.
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) | Low | 1/100 |
| 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) | Low | 13/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Low | 6/100 |
Local Environmental Conditions
Curitiba's urban green network, anchored by Barigui Park and the Iguaçu River corridor, features Araucaria pine, eucalyptus, and native Atlantic Forest species as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Paraná highland woodland and farmland contribute substantial tree and grass pollen, with the subtropical highland climate producing a more defined pollen season than in lower-altitude Brazilian cities.
Curitiba's 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 across the city. The subtropical highland climate means the season is more defined than in tropical Brazilian cities, with the wet summer months from November to March bringing frequent rainfall that suppresses dispersal across the city.
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Frequently Asked Questions About Pollen in Paraná
Is pollen high in Curitiba right now?
On 20 September 2026, overall pollen levels in Curitiba are low. Cypress is the main contributor to airborne pollen
Will pollen levels change in Curitiba tomorrow?
On 21 September 2026, pollen conditions in Curitiba will be different from today, with cypress at low levels, willow at low levels
Is pollen expected to decrease in Curitiba 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 Curitiba?
On 20 September 2026, Cypress is the dominant pollen source in Curitiba. grass and willow are not currently active.
When is pollen season in Curitiba?
How often is the Curitiba pollen forecast updated?
The Curitiba pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Curitiba 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 Curitiba 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 Curitiba, 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).
