Grass Pollen Count in Rosny-sous-Bois, France — Today

Updated Monday, November 9, 2026

This reading is the forecast point shared with Neuilly-Plaisance, France — 2 nearby places use the same point; Rosny-sous-Bois is 0.4 km from it.

Pollen by type in Rosny-sous-Bois

What is the grass pollen count in Rosny-sous-Bois today?

The Rosny-sous-Bois grass pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Rosny-sous-Bois’s overall pollen count today is 32 (Low) across all types. See the full Rosny-sous-Bois pollen count for the overall index and every type together.

Rosny-sous-Bois Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Monday, November 932Low
Tuesday, November 1013Low
Wednesday, November 1130Low
Thursday, November 1231Low
Friday, November 1330Low

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 Rosny-sous-Bois’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Rosny-sous-Bois’s grass pollen

The modelled data reports grass as one combined index — there is no species-by-species split for grass anywhere in the data, so this page does not invent one. Today’s modelled grass index for Rosny-sous-Bois is 0.6 (Low), and the 5-day overall trend above shows the shape of the week.

As regional context only — not as today’s readings — in the Continental West pattern, the plants that typically shape this city’s year are early hazel and alder, a birch-led spring, late-spring grasses, and late-summer mugwort and ragweed.

Plants affecting Rosny-sous-Bois now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Rosny-sous-Bois. The type summary stands: grass pollen reads 0.6 (Low) today.

In the Continental West pattern, the plants that typically shape this city’s year are early hazel and alder, a birch-led spring, late-spring grasses, and late-summer mugwort and ragweed — 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 grass pollen level means

Low risk. Keep windows open; consider allergy meds only if sensitive.

Enjoy outdoor activities.

Grasses hold from May through July, cresting in late May and June. This month sits outside the usual grass pollen window for the Continental West pattern, so today’s grass pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. No France allergy season guide is published yet, so the seasonal context here follows the Continental West regional pattern.

Rosny-sous-Bois allergies today

Rosny-sous-Bois allergies today are set by the same reading as the Rosny-sous-Bois pollen count today: the Total Pollen Index is 32 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Rosny-sous-Bois allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Rosny-sous-Bois.

Allergies in Rosny-sous-Bois follow the France calendar set out on the full Rosny-sous-Bois 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 Rosny-sous-Bois before heading outdoors, the grass 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 Rosny-sous-Bois allergy forecast for the grass pollen season: it shows whether Rosny-sous-Bois 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 Rosny-sous-Bois pollen count — all types, the overall index and today’s ranking context

Rosny-sous-Bois tree pollen count

Rosny-sous-Bois ragweed pollen count

See how Rosny-sous-Bois ranks in today's pollen count rankings — the worst cities for allergies today

See Rosny-sous-Bois on the pollen map

Every pollen type, with photos and seasons: the pollen directory

Worst cities for allergies

Grass pollen season

Find an allergist in Rosny-sous-Bois, France

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).