Rio do Sul pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Rio do Sul 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 and willow will increase; 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) | Low | 1/100 |
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 | 2/100 |
Local Environmental Conditions
Rio do Sul commands the Santa Catarina Alto Vale do Itajaí region as its main city on the Itajaí-Açu River, where native Atlantic Forest species, eucalyptus, and the river corridor vegetation are the main pollen sources. The subtropical climate produces a well-defined pollen season, while the Itajaí valley concentrates pollen under certain conditions and rainfall interruptions occur throughout the year in this important Santa Catarina highland valley city.
Rio do Sul's pollen season follows the region's typical pattern, led by native Atlantic Forest species and eucalyptus pollen, with exposure varying across the year according to local seasonal rainfall and temperature patterns.
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Frequently Asked Questions About Pollen in Santa Catarina
Is pollen high in Rio do Sul right now?
On 20 September 2026, overall pollen levels in Rio do Sul are low. Cypress is the main contributor to airborne pollen, while willow remain at lower levels
Will pollen levels change in Rio do Sul tomorrow?
On 21 September 2026, pollen conditions in Rio do Sul will be similar to today, with cypress at low levels, willow at low levels
Is pollen expected to decrease in Rio do Sul this week?
According to the five-day outlook, cypress and willow pollen levels will increase later in the week.
Which pollen types are currently active in Rio do Sul?
On 20 September 2026, Cypress is the dominant pollen source in Rio do Sul. willow are also present but at lower levels. grass are not currently active.
When is pollen season in Rio do Sul?
How often is the Rio do Sul pollen forecast updated?
The Rio do Sul pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rio do Sul 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 Rio do Sul 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 Rio do Sul, 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).
