Três Rios pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Três Rios is low; cypress is low. Tomorrow (17 July 2026) levels are similar. Over the following five days cypress will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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Três Rios occupies the Paraíba do Sul valley at the confluence with the Rio Negro in Rio de Janeiro state, where native Atlantic Forest remnants, eucalyptus, and the river corridor vegetation are the main pollen sources. The tropical climate supports year-round pollen production, while the river valley concentrates pollen under calm conditions and the wet summer months bring the most frequent rainfall interruptions throughout this Rio de Janeiro valley municipality.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    2/100

  • Grass (Poaceae):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Amaranthaceae:

    None

    0/100

High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.

Tomorrow - 17 July

  • 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

  • Amaranthaceae:

    None

    0/100

Air quality in Três Rios

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Frequently Asked Questions

Is pollen high in Três Rios right now?

On 16 July 2026, overall pollen levels in Três Rios are low. Cypress is the main contributor to airborne pollen

Will pollen levels change in Três Rios tomorrow?

On 17 July 2026, pollen conditions in Três Rios will be similar to today, with cypress at low levels

Is pollen expected to decrease in Três Rios this week?

According to the five-day outlook, cypress pollen levels will increase later in the week.

Which pollen types are currently active in Três Rios?

On 16 July 2026, Cypress is the dominant pollen source in Três Rios. amaranthaceae and willow are not currently active.

When is pollen season in Três Rios?
Expect the strongest pollen exposure in Três Rios during the dry season, when native Atlantic Forest remnants and eucalyptus pollen disperses most easily, while the wet season brings the regular relief of rainfall.
How often is the Três Rios pollen forecast updated?

The Três Rios pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Três Rios 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 Três Rios 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 Três Rios, 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.

Want to see pollen forecasts for other cities in Brazil?

Belo Horizonte Curitiba Fortaleza Guarulhos Porto Alegre Recife Rio de Janeiro Salvador São Paulo

Check pollen in other popular cities:

Rio de Janeiro Copenhagen Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Três Rios.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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