Ragweed Pollen Count in Rio de Janeiro, Brazil — Today
Updated Saturday, November 7, 2026
Pollen by type in Rio de Janeiro
What is the ragweed pollen count in Rio de Janeiro today?
The Rio de Janeiro ragweed pollen index today is 11 (Low) on Pollen Atlas’s modelled 0–100 scale. Low
Modelled pollen risk index — not a measured count.
Rio de Janeiro’s overall pollen count today is 14 (Low) across all types. See the full Rio de Janeiro pollen count for the overall index and every type together.
Rio de Janeiro is in Rio de Janeiro, Brazil. Its population is 6,747,815 (GeoNames).
Rio de Janeiro Ragweed Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Saturday, November 7 | 14 | Low |
| Sunday, November 8 | 13 | Low |
| Monday, November 9 | 14 | Low |
| Tuesday, November 10 | 32 | Low |
| Wednesday, November 11 | 32 | Low |
Pollen Atlas models the daily detail as an overall index: day-by-day splits by individual pollen type are not part of the modelled data, so this table shows Rio de Janeiro’s overall trend across the week. Today’s ragweed pollen reading is the headline above.
Species driving Rio de Janeiro’s ragweed pollen
Species-level counts are not part of the modelled data Pollen Atlas publishes — the modelled index is reported per pollen type, not per species — so this section gives the type summary: ragweed pollen reads 11 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.
How to read this: the “ragweed” figure on this site is the modelled weed pollen index — the weed group (ragweed + mugwort) — printed under the ragweed name the rankings use.
Plants affecting Rio de Janeiro now — ragweed pollen
Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Rio de Janeiro. The type summary stands: ragweed pollen reads 11 (Low) today.
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’s readings.
Plant detail returns here automatically on any day the feed includes it.
What this ragweed pollen level means
Low risk. Keep windows open; consider allergy meds only if sensitive.
Enjoy outdoor activities.
Weed pollen seasons vary with local climate and vegetation, and no regional calendar is asserted for this area. No regional calendar is asserted for this area, so today’s ragweed pollen reading is reported as a modelled index value, without placing this month inside or outside a regional window. No Brazil allergy season guide is published yet, so the seasonal context here follows the Global regional pattern.
Rio de Janeiro allergies today
Rio de Janeiro allergies today are set by the same reading as the Rio de Janeiro pollen count today: the Total Pollen Index is 14 (Low), and the ragweed pollen index on this page is 11 (Low) of it. When people ask about Rio de Janeiro allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Rio de Janeiro.
Allergies in Rio de Janeiro follow the Brazil calendar set out on the full Rio de Janeiro page — the chapters, the plants behind them, and the 5-day forecast show whether today is typical for the season or an exception to it. If you are checking allergies today in Rio de Janeiro before heading outdoors, the ragweed pollen split on this page is the part to read: it shows whether this pollen type is doing the work today, not just how high the total sits.
Read the five-day overall trend above as the Rio de Janeiro allergy forecast for the ragweed pollen season: it shows whether Rio de Janeiro allergies are set to ease or build across the week, day by day — the days to plan outdoor time around are the ones where the overall index steps down, not just today.
See the full Rio de Janeiro pollen count — all types, the overall index and today’s ranking context
Rio de Janeiro tree pollen count
Rio de Janeiro grass pollen count
See how Rio de Janeiro ranks in today's pollen count rankings — the worst cities for allergies today
See Rio de Janeiro on the pollen map
Every pollen type, with photos and seasons: the pollen directory
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).