Tree 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 tree pollen count in Hemel Hempstead today?
The Hemel Hempstead tree pollen index today is 23 (Low) on Pollen Atlas’s modelled 0–100 scale. Low
Modelled pollen risk index — not a measured count.
Hemel Hempstead’s overall pollen count today is 39 (Low) across all types. See the full Hemel Hempstead pollen count for the overall index and every type together.
Hemel Hempstead Tree Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Saturday, November 7 | 39 | Low |
| Sunday, November 8 | 39 | Low |
| Monday, November 9 | 42 | Moderate |
| Tuesday, November 10 | 28 | Low |
| Wednesday, November 11 | 18 | 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 Hemel Hempstead’s overall trend across the week. Today’s tree pollen reading is the headline above.
Species driving Hemel Hempstead’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 23 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.
Plants affecting Hemel Hempstead now — tree pollen
Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Hemel Hempstead. The type summary stands: tree pollen reads 23 (Low) 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 tree pollen level means
Low risk. Keep windows open; consider allergy meds only if sensitive.
Enjoy outdoor activities.
Hazel and alder can open as early as February in mild winters, and the main tree wave — birch, then oak — builds through spring to a May peak. This month sits outside the usual tree pollen window for the Atlantic West pattern, so today’s tree 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 tree pollen index on this page is 23 (Low) 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 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 Hemel Hempstead allergy forecast for the tree 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 grass pollen count
Hemel Hempstead ragweed pollen count
See Hemel Hempstead 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).