Grass Pollen Count in Le Port-Marly, France — Today
Updated Saturday, November 7, 2026
Pollen by type in Le Port-Marly
What is the grass pollen count in Le Port-Marly today?
The Le Port-Marly 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.
Le Port-Marly’s overall pollen count today is 33 (Low) across all types. See the full Le Port-Marly pollen count for the overall index and every type together.
Le Port-Marly is in Yvelines, Île-de-France, France. Its population is 4,640 (GeoNames).
Le Port-Marly Grass Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Saturday, November 7 | 33 | Low |
| Sunday, November 8 | 33 | Low |
| Monday, November 9 | 36 | Low |
| Tuesday, November 10 | 21 | Low |
| Wednesday, November 11 | 22 | 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 Le Port-Marly’s overall trend across the week. Today’s grass pollen reading is the headline above.
Species driving Le Port-Marly’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 Le Port-Marly 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 Le Port-Marly now — grass pollen
Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Le Port-Marly. 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.
Le Port-Marly allergies today
Le Port-Marly allergies today are set by the same reading as the Le Port-Marly pollen count today: the Total Pollen Index is 33 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Le Port-Marly allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Le Port-Marly.
Allergies in Le Port-Marly follow the France calendar set out on the full Le Port-Marly 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 Le Port-Marly 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 Le Port-Marly allergy forecast for the grass pollen season: it shows whether Le Port-Marly 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 Le Port-Marly pollen count — all types, the overall index and today’s ranking context
Le Port-Marly tree pollen count
Le Port-Marly ragweed pollen count
See how Le Port-Marly ranks in today's pollen count rankings — the worst cities for allergies today
See Le Port-Marly 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).