Petrópolis pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Petrópolis 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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Petrópolis climbs into the Rio de Janeiro Serra Fluminense highlands as the historic imperial mountain city, where native Atlantic Forest remnants, introduced European ornamental trees, and highland campo vegetation are the main pollen sources. The very wet Serra Fluminense climate provides very frequent rainfall interruptions and the subtropical highland setting creates variable local conditions, while the wet summer months intensify these interruptions throughout this historic Rio de Janeiro mountain resort.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    8/100

  • 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

    8/100

  • Grass (Poaceae):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Amaranthaceae:

    None

    0/100

Air quality in Petrópolis

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Frequently Asked Questions

Is pollen high in Petrópolis right now?

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

Will pollen levels change in Petrópolis tomorrow?

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

Is pollen expected to decrease in Petrópolis this week?

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

Which pollen types are currently active in Petrópolis?

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

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

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

Does pollen in Petrópolis 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 Petrópolis 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 Petrópolis, 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 Petrópolis.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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