Ragweed Pollen Count in Castlebar, Ireland — Today

Updated Saturday, November 7, 2026

Pollen by type in Castlebar

What is the ragweed pollen count in Castlebar today?

The Castlebar ragweed pollen index today is 23 (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 Castlebar today. See the full Castlebar pollen count for the overall index and every type together.

Castlebar is in Mayo County, Connacht, Ireland. Its population is 13,054 (GeoNames).

Castlebar Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 720Low
Sunday, November 820Low
Monday, November 921Low
Tuesday, November 109Low
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 Castlebar’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Castlebar’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 23 (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 Castlebar now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Castlebar. The type summary stands: ragweed 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 ragweed pollen level means

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

Enjoy outdoor activities.

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 Ireland allergy season guide is published yet, so the seasonal context here follows the Atlantic West regional pattern.

Castlebar allergies today

Castlebar allergies today are set by the same reading as the Castlebar pollen count today: the Total Pollen Index is 20 (Low), and the ragweed pollen index on this page is 23 (Low) of it. When people ask about Castlebar allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Castlebar.

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

Castlebar tree pollen count

Castlebar grass pollen count

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

See Castlebar on the pollen map

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

Worst cities for allergies

Ragweed season

Find an allergist in Castlebar, Ireland

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).