Petrópolis, Brazil Pollen Count Today
Petrópolis, Brazil · Updated Saturday, November 7, 2026
Pollen Overview
Today's overall pollen level and the dominant type (trees, weeds, grass, or mold).
Total Pollen Index
The combined pollen level across all types (0–100).
Petrópolis, Brazil
Grass Index
How active grass pollen is today (0–100).
Petrópolis, Brazil
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Petrópolis Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Petrópolis residents check each morning
The Petrópolis pollen count today is 12 (Low). No single plant stands out in today’s readings; the Grass category is the one the index is led by. The full split is tree pollen 8, grass pollen 13, weed pollen 7. The sections below break that headline number down by plant, by day and by what the band means in practice. Pollen Atlas updated this count on Saturday, November 7, 2026.
A Low band on the Pollen Atlas index means the Total Pollen Index has stayed in the lower part of the 0–100 scale. Readings in this band are built from low individual category values rather than from one large spike, and the category split above matters more than the headline number: a low total can still contain one category, such as grass pollen, reading noticeably higher than the rest, which is why the split is printed on every Petrópolis page.
Outside its main late-spring and early-summer window, grass pollen usually appears as a small background value rather than the driver of the total. A low grass reading alongside a higher weed or mold value is a typical off-peak pattern. Grass should be read from its own value on this page, not assumed from the calendar: the index reports today’s modelled value, and the modelled value outranks any general seasonal expectation.
To see whether today’s pollen level holds, check the 5-day Petrópolis pollen forecast below — it is currently mixed, with Tuesday the highest day in the window.
This is the pollen count Petrópolis residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Petrópolis pollen count today?
The Petrópolis pollen count today is 12 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Grass.
Short answer for anyone searching pollen count today Petrópolis: this page is updated every morning with the day’s modelled reading.
Petrópolis allergies today
Petrópolis allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 12 (Low), driven mainly by Grass. When people ask about Petrópolis allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Petrópolis.
Allergies in Petrópolis follow the Brazil calendar set out below — the chapters, the plants behind them, and the 5-day forecast on this page show whether today is typical for the season or an exception to it. If you are checking allergies today in Petrópolis before heading outdoors, the split at the top of this page is the part to read: it shows which pollen is doing the work today, not just how high the total sits.
Read the five-day table on this page as the Petrópolis allergy forecast: today reads 12 (Low), and the day-by-day outlook shows whether Petrópolis allergies are set to ease or build across the week — the days to plan outdoor time around are the ones where the index steps down, not just today.
In practice, the allergy count Petrópolis today records is this same combined reading — tree, grass, weed and mold in one index.
The Petrópolis allergy count today is 12 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Petrópolis: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 12 | Low |
| Sunday, November 8 | 12 | Low |
| Monday, November 9 | 10 | Low |
| Tuesday, November 10 | 15 | Low |
| Wednesday, November 11 | 15 | Low |
Pollen Atlas forecasts Petrópolis’s pollen count to peak on Tuesday at 15 (Low) over the next 5 days.
Pollen by type in Petrópolis
What is driving Petrópolis’s pollen today
The shape of today’s 12 (Low) is set by grass pollen at 13 (Low on its own scale) — about 46% of the four category readings added together, 5 points clear of the next category, tree pollen at 8. Grass-led totals tend to hold a level for days at a time rather than spike and clear, because grasses pollinate over an extended period. Grass pollen leading in November is a modelled reading, reported as modelled — no regional calendar is asserted for Brazil, and the modelled value outranks any general seasonal expectation.
Plant-level detail is not in today’s feed for Petrópolis, so the drivers have to be read from the category split above — it shows how much of today’s total each category is actually carrying, and plant detail returns here automatically on any day the feed includes it.
Across the five-day window the Total Pollen Index runs from 10 to 15, never changing band. Today’s 12 sits 1 point below the window’s average of 12.8 — a steady window, in which one day reads much like the next.
Plants affecting Petrópolis now
Detailed plant-by-plant readings for Petrópolis were not returned in today\u2019s source data, so this section summarises the pollen types the index above is built from instead of listing individual plants.
Tree pollen is one of the categories with a non-zero reading today, at 8 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 13 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 7 (Low).
In the Global pattern, the plants that shape this city’s year vary with its local climate and vegetation, and no single regional calendar is published for this area — named here as regional context only, not as today\u2019s measurements.
Plant detail returns here automatically on any day the source data includes it.
Every pollen type, with photos and seasons: the pollen directory.
Petrópolis pollen through the year
The Petrópolis pollen year runs in chapters, set by the Global pattern and the Brazil calendar. Trees come first: tree pollen seasons vary with local climate and vegetation, so this page reports the measured readings first and treats any calendar as background only. Grasses take the middle of the year: grass pollen seasons vary with local climate and vegetation, and the measured value outranks any general seasonal expectation. Weeds close it out: weed pollen seasons vary with local climate and vegetation, and no regional calendar is asserted for this area.
No Brazil allergy season guide is published yet, so this page does not single out signature pollens for Petrópolis — the calendar above is the Global regional pattern, and the plant detail on this page names what today’s feed actually records.
November in Petrópolis is reported from its modelled readings, not from a regional calendar — no regional calendar is asserted for Brazil, so the calendar alone explains little today, and the modelled split above carries the story. No Brazil allergy season guide is published yet — this calendar follows the Global regional pattern. See Petrópolis pollen count rankings and Petrópolis on the pollen heatmap.
How to read this index
Pollen Atlas reports the Petrópolis pollen count on a Total Pollen Index from 0 to 100, built from separate tree, grass and weed readings. The total is a summary, not an average of the three: a single strong category can lift it, and three quiet categories can hold it down whatever the month. Index values are a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data, with plant detail by the Google Pollen API. The index is a modelled 0–100 scale, not a measured count, and figures update through the day, so a morning and an evening visit to this page can legitimately show different numbers.
Petrópolis in today’s national picture
At 12 (Low), Petrópolis ranks joint 76525th of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Beja, Portugal at 52, and the lowest is Los Ángeles de San Rafael, Spain at 5. The whole table spans 47 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.
Around Petrópolis: Magé, Brazil (22 km away) reads 13 (Low); Teresópolis, Brazil (23 km away) reads 12 (Low); Duque de Caxias, Brazil (34 km away) reads 14 (Low). Petrópolis reads 1 point lower than its nearest tracked neighbour today. Across Brazil’s 173 tracked cities, today runs from 8 in Colombo to 36 in Arapiraca.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Petrópolis resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Petrópolis, Brazil can test whether tree, grass, weed or mold is the category that matters for you — the four readings at the top of this page are the starting point for that conversation.
Petrópolis in its local area
Petrópolis is in Petrópolis, Rio de Janeiro, Brazil. Its population is 294,926 (GeoNames).
Across Brazil’s 173 tracked cities, Petrópolis ranks joint 149th today.
Like every Pollen Atlas city page, the Petrópolis, Brazil pollen count is refreshed each morning.
Nearby cities
- Magé pollen count (22 km away)
- Teresópolis pollen count (23 km away)
- Duque de Caxias pollen count (34 km away)
- São Gonçalo pollen count (38 km away)
- São João de Meriti pollen count (39 km away)
- Nova Iguaçu pollen count (40 km away)
From Pollen Atlas News
See how Petrópolis ranks in today's pollen count rankings — the worst cities for allergies today
Pollen indexes: a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data. Plant detail: Google Pollen API. Index values are modelled, not measured counts. Sources: CDC/NAB; USA-NPN; GBIF (CC BY); ESA WorldCover (CC BY 4.0).