Grass Pollen Count in Welwyn Garden City, United Kingdom — Today

Updated Saturday, November 7, 2026

Pollen by type in Welwyn Garden City

What is the grass pollen count in Welwyn Garden City today?

The Welwyn Garden City 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.

Welwyn Garden City’s overall pollen count today is 32 (Low) across all types. See the full Welwyn Garden City pollen count for the overall index and every type together.

Welwyn Garden City Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 732Low
Sunday, November 831Low
Monday, November 934Low
Tuesday, November 1022Low
Wednesday, November 1114Low

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 Welwyn Garden City’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Welwyn Garden City’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 Welwyn Garden City 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 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.

Plants affecting Welwyn Garden City now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Welwyn Garden City. The type summary stands: grass pollen reads 0.6 (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 grass pollen level means

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

Enjoy outdoor activities.

Grasses hold from late May into July, peaking in late spring and early summer. This month sits outside the usual grass pollen window for the Atlantic West pattern, so today’s grass 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.

Welwyn Garden City allergies today

Welwyn Garden City allergies today are set by the same reading as the Welwyn Garden City pollen count today: the Total Pollen Index is 32 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Welwyn Garden City allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Welwyn Garden City.

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

Welwyn Garden City tree pollen count

Welwyn Garden City ragweed pollen count

See how Welwyn Garden City ranks in today's pollen count rankings — the worst cities for allergies today

See Welwyn Garden City on the pollen map

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

Worst cities for allergies

Grass pollen season

Find an allergist in Welwyn Garden City, 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).