Grand Rosier, Italy Pollen Count Today
Grand Rosier, Italy · Updated Monday, November 9, 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).
Grand Rosier, Italy
Weeds Index
How active weeds pollen is today (0–100).
Grand Rosier, Italy
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Grand Rosier Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
This reading is the forecast point shared with Arnad, Italy — 11 nearby places use the same point; Grand Rosier is 7 km from it.
Pollen count Grand Rosier residents check each morning
The Grand Rosier pollen count today is 5 (Low). The main driver is Ragweed, with weed pollen at 4 today. Weed pollen leads the split at 4 (Low on its own scale), followed by tree pollen at 0.6 and grass pollen at 0.6. Below, the plant detail and the multi-day outlook show whether today is the pattern or the exception. Pollen Atlas updated this count on Monday, November 9, 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 weed pollen or mold, reading noticeably higher than the rest, which is why the split is printed on every Grand Rosier page.
Fall is ragweed season across most of the United States: ragweed plants release pollen from late summer into autumn, and weed pollen is typically the last major outdoor pollen category to fade as the weather cools. That pattern is why an autumn total is so often weed-led even when the headline number is low — tree and grass pollen have usually receded by then, leaving weed pollen, and on damp days mold, to make up most of what the index records.
To see whether today’s pollen level holds, check the 5-day Grand Rosier pollen forecast below — it is currently holding, with Monday the highest day in the window.
This is the pollen count Grand Rosier residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Grand Rosier pollen count today?
The Grand Rosier pollen count today is 5 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Grand Rosier: this page is updated every morning with the day’s modelled reading.
Grand Rosier allergies today
Grand Rosier allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 5 (Low), driven mainly by Ragweed. When people ask about Grand Rosier allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Grand Rosier.
Allergies in Grand Rosier follow the Italy 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 Grand Rosier 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 Grand Rosier allergy forecast: today reads 5 (Low), and the day-by-day outlook shows whether Grand Rosier 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 Grand Rosier today records is this same combined reading — tree, grass, weed and mold in one index.
The Grand Rosier allergy count today is 5 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Grand Rosier: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Monday, November 9 | 5 | Low |
| Tuesday, November 10 | 5 | Low |
| Wednesday, November 11 | 5 | Low |
| Thursday, November 12 | 5 | Low |
| Friday, November 13 | 5 | Low |
Pollen Atlas forecasts Grand Rosier’s pollen count to peak on Monday at 5 (Low) over the next 5 days.
Pollen by type in Grand Rosier
What is driving Grand Rosier’s pollen today
The shape of today’s 5 (Low) is set by weed pollen at 4 (Low on its own scale) — about 77% of the four category readings added together, 3.4 points clear of the next category, tree pollen at 0.6. A weed-led total is the classic late-year shape: tree and grass pollen have usually receded, leaving weed pollen — and on damp days mold — to make up most of what the index records. Weed pollen leading in November is the Italy calendar working as expected — November falls in the closing weeks of the country’s weed chapter.
Plant-level detail is not in today’s feed for Grand Rosier, 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 5 to 5, never changing band. Today’s 5 sits level with the window’s average of 5 — a steady window, in which one day reads much like the next.
Plants affecting Grand Rosier now
Detailed plant-by-plant readings for Grand Rosier 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 0.6 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 0.6 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 4 (Low).
In the Mediterranean pattern, the plants that typically shape this city’s year are winter cypress and early hazel, spring grasses and olive, and late-summer weeds spread across a long, mild season — 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.
Grand Rosier pollen through the year
Three chapters make the Italy pollen year, and Grand Rosier follows them in the Mediterranean order. The tree chapter: cypress opens the year in winter, hazel and alder follow early, and olive carries the spring peak from April into May. The grass chapter: grasses build from spring and peak from April into June, earlier in the south. The weed chapter: weeds — pellitory through the warm months and ragweed in late summer where it has spread — close a long season that can run into November.
No Italy allergy season guide is published yet, so this page does not single out signature pollens for Grand Rosier — the calendar above is the Mediterranean regional pattern, and the plant detail on this page names what today’s feed actually records.
November in Grand Rosier sits inside the weed chapter of the Italy year, in its closing weeks — the part of the calendar today’s readings should be judged against. Between them, the three chapters cover 10 months of the Italy year, January to November — a long season by national standards, with only a short quiet gap. No Italy allergy season guide is published yet — this calendar follows the Mediterranean regional pattern. See Grand Rosier pollen count rankings and Grand Rosier on the pollen heatmap.
How to read this index
Pollen Atlas reports the Grand Rosier 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 even in a month when Grand Rosier, Italy pollen is usually more active. 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.
Grand Rosier in today’s national picture
At 5 (Low), Grand Rosier ranks joint 137737th of the 217874 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Zuoz, Switzerland at 66, and the lowest is Извор, North Macedonia at 5. The whole table spans 61 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.
Around Grand Rosier: Petit Rosier, Italy (1 km away) reads 26 (Low); Salleret, Italy (1 km away) reads 5 (Low); Fraissiney-Savin, Italy (1 km away) reads 5 (Low). Grand Rosier reads 21 points lower than its nearest tracked neighbour today. Across Italy’s 43618 tracked cities, today runs from 5 in Verona to 64 in Trepalle.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Grand Rosier resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in Grand Rosier, Italy 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.
Grand Rosier in its local area
Grand Rosier is in Valle d'Aosta, Aosta Valley, Italy. Its population is 23 (GeoNames).
Grand Rosier sits 5.6 km west-southwest of Arnad, Italy — the anchor of the forecast-point group this reading belongs to. Within the group of 11, Grand Rosier ranks joint 1st; across Italy’s 43618 tracked cities, it ranks joint 25110th today.
Like every Pollen Atlas city page, the Grand Rosier, Italy pollen count is refreshed each morning.
Nearby cities
- Petit Rosier pollen count (1 km away)
- Salleret pollen count (1 km away)
- Fraissiney-Savin pollen count (1 km away)
- Mellier pollen count (1 km away)
- Vigneroisa pollen count (2 km away)
- Trambesere-Pialemont pollen count (2 km away)
From Pollen Atlas News
See how Grand Rosier 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).