Passo Fundo Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Passo Fundo is low; grass is low.
Pollen Tomorrow
Tomorrow (11 October 2026) grass remains low, cypress at low levels, willow at low levels.
7-Day Trend
Over the next week cypress, grass, and willow will increase.
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Pollen Risk
Today - 10 October
| 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) | Low | 1/100 |
| Willow (Salicaceae) | None | 0/100 |
Tomorrow - 11 October
| 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 | 1/100 | |
| Grass (Poaceae) | Low | 3/100 | |
| Willow (Salicaceae) | Low | 1/100 |
Local Environmental Conditions
The center of Passo Fundo is surrounded mainly by built-up land, which covers around 87% of the nearby area, with some woodland. Grasses are also a significant pollen source here. In the immediate area, street trees, parks and lawns are the main sources in the built-up parts. Grasses along roadsides, verges and open ground also add to the overall pollen load.
Flowering trees bring the first pollen of the year in early spring. Grass pollen follows, peaking in mid-spring and easing off by early fall. Weeds on open ground add a smaller late peak from early summer into early fall. In warm, humid weather through spring, mold spores add to the mix, especially after rain.
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Frequently Asked Questions About Pollen in Rio Grande do Sul
Is pollen high in Passo Fundo right now?
On 10 October 2026, overall pollen levels in Passo Fundo are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Passo Fundo tomorrow?
On 11 October 2026, pollen conditions in Passo Fundo will be different from today, with cypress at low levels, grass at low levels, willow at low levels
Is pollen expected to decrease in Passo Fundo this week?
According to the five-day outlook, cypress, grass, and willow pollen levels will increase later in the week.
Which pollen types are currently active in Passo Fundo?
On 10 October 2026, Grass is the dominant pollen source in Passo Fundo. cypress and willow are not currently active.
When is pollen season in Passo Fundo?
How often is the Passo Fundo pollen forecast updated?
The Passo Fundo pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Passo Fundo 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 Passo Fundo 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 Passo Fundo, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
