Ragweed Pollen Count in Hemel Hempstead, United Kingdom — Today

Updated Saturday, November 7, 2026

This reading is the forecast point shared with Leverstock Green, United Kingdom — 2 nearby places use the same point; Hemel Hempstead is 0.5 km from it.

Pollen by type in Hemel Hempstead

What is the ragweed pollen count in Hemel Hempstead today?

The Hemel Hempstead ragweed pollen index today is 48 (Moderate) on Pollen Atlas’s modelled 0–100 scale. Moderate

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in Hemel Hempstead today. See the full Hemel Hempstead pollen count for the overall index and every type together.

Hemel Hempstead Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 739Low
Sunday, November 839Low
Monday, November 942Moderate
Tuesday, November 1028Low
Wednesday, November 1118Low

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 Hemel Hempstead’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Hemel Hempstead’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 48 (Moderate) 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 Hemel Hempstead now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Hemel Hempstead. The type summary stands: ragweed pollen reads 48 (Moderate) today.

In the Atlantic West pattern, the plants that typically shape this city’s year are early hazel and alder, a spring birch and oak wave, late-spring and summer grasses, and a modest late-summer weed finish — 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

Moderate risk. If you have allergies, consider meds and limit exposure during peak hours.

Keep windows closed at midday; shower after being outside.

Weeds are the minor closing act — mugwort through late summer, with ragweed localised and generally light this far west. This month sits outside the usual ragweed pollen window for the Atlantic West pattern, so today’s ragweed pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. No United Kingdom allergy season guide is published yet, so the seasonal context here follows the Atlantic West regional pattern.

Hemel Hempstead allergies today

Hemel Hempstead allergies today are set by the same reading as the Hemel Hempstead pollen count today: the Total Pollen Index is 39 (Low), and the ragweed pollen index on this page is 48 (Moderate) of it. When people ask about Hemel Hempstead allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Hemel Hempstead.

Allergies in Hemel Hempstead follow the United Kingdom calendar set out on the full Hemel Hempstead 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 Hemel Hempstead 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 Hemel Hempstead allergy forecast for the ragweed pollen season: it shows whether Hemel Hempstead 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 Hemel Hempstead pollen count — all types, the overall index and today’s ranking context

Hemel Hempstead tree pollen count

Hemel Hempstead grass pollen count

See how Hemel Hempstead ranks in today's pollen count rankings — the worst cities for allergies today

See Hemel Hempstead on the pollen map

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

Worst cities for allergies

Ragweed season

Find an allergist in Hemel Hempstead, United Kingdom

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).