Ragweed Pollen Count in Herlin-le-Sec, France — Today

Updated Monday, November 9, 2026

This reading is the forecast point shared with Gauchin-Verloingt, France — 14 nearby places use the same point; Herlin-le-Sec is 2.9 km from it.

Pollen by type in Herlin-le-Sec

What is the ragweed pollen count in Herlin-le-Sec today?

The Herlin-le-Sec ragweed pollen index today is 13 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in Herlin-le-Sec today. See the full Herlin-le-Sec pollen count for the overall index and every type together.

Herlin-le-Sec is in Pas-de-Calais, Hauts-de-France, France. Its population is 156 (GeoNames).

Herlin-le-Sec Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Monday, November 918Low
Tuesday, November 108Low
Wednesday, November 1111Low
Thursday, November 1216Low
Friday, November 1315Low

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 Herlin-le-Sec’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Herlin-le-Sec’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 13 (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 Herlin-le-Sec now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Herlin-le-Sec. The type summary stands: ragweed pollen reads 13 (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 ragweed pollen level means

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

Enjoy outdoor activities.

Mugwort and ragweed build from August, peak in September, and are ended by the first hard frost. This month sits outside the usual ragweed pollen window for the Continental West pattern, so today’s ragweed 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.

Herlin-le-Sec allergies today

Herlin-le-Sec allergies today are set by the same reading as the Herlin-le-Sec pollen count today: the Total Pollen Index is 18 (Low), and the ragweed pollen index on this page is 13 (Low) of it. When people ask about Herlin-le-Sec allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Herlin-le-Sec.

Allergies in Herlin-le-Sec follow the France calendar set out on the full Herlin-le-Sec 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 Herlin-le-Sec 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 Herlin-le-Sec allergy forecast for the ragweed pollen season: it shows whether Herlin-le-Sec 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 Herlin-le-Sec pollen count — all types, the overall index and today’s ranking context

Herlin-le-Sec tree pollen count

Herlin-le-Sec grass pollen count

See how Herlin-le-Sec ranks in today's pollen count rankings — the worst cities for allergies today

See Herlin-le-Sec on the pollen map

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

Worst cities for allergies

Ragweed season

Find an allergist in Herlin-le-Sec, 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).