Tree Pollen Count in Saint-Léger-en-Yvelines, France — Today

Updated Saturday, November 7, 2026

Pollen by type in Saint-Léger-en-Yvelines

What is the tree pollen count in Saint-Léger-en-Yvelines today?

The Saint-Léger-en-Yvelines tree pollen index today is 31 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Saint-Léger-en-Yvelines’s overall pollen count today is 31 (Low) across all types. See the full Saint-Léger-en-Yvelines pollen count for the overall index and every type together.

Saint-Léger-en-Yvelines is in Yvelines, Île-de-France, France. Its population is 1,395 (GeoNames).

Saint-Léger-en-Yvelines Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 731Low
Sunday, November 831Low
Monday, November 934Low
Tuesday, November 1021Low
Wednesday, November 1121Low

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 Saint-Léger-en-Yvelines’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Saint-Léger-en-Yvelines’s tree 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: tree pollen reads 31 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Saint-Léger-en-Yvelines now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Saint-Léger-en-Yvelines. The type summary stands: tree pollen reads 31 (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 tree pollen level means

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

Enjoy outdoor activities.

Hazel and alder open from February, and birch leads the spring peak through April and into May. This month sits outside the usual tree pollen window for the Continental West pattern, so today’s tree 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.

Saint-Léger-en-Yvelines allergies today

Saint-Léger-en-Yvelines allergies today are set by the same reading as the Saint-Léger-en-Yvelines pollen count today: the Total Pollen Index is 31 (Low), and the tree pollen index on this page is 31 (Low) of it. When people ask about Saint-Léger-en-Yvelines allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Saint-Léger-en-Yvelines.

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

Saint-Léger-en-Yvelines grass pollen count

Saint-Léger-en-Yvelines ragweed pollen count

See how Saint-Léger-en-Yvelines ranks in today's pollen count rankings — the worst cities for allergies today

See Saint-Léger-en-Yvelines on the pollen map

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

Worst cities for allergies

Tree pollen season

Find an allergist in Saint-Léger-en-Yvelines, 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).