Castletroy, Ireland Pollen Count Today
Castletroy, Ireland · Updated Saturday, November 7, 2026
Pollen Overview
Today's overall pollen level and the dominant type (trees, weeds, grass, or mold).
Total Pollen Index
The combined pollen level across all types (0–100).
Castletroy, Ireland
Weeds Index
How active weeds pollen is today (0–100).
Castletroy, Ireland
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Castletroy Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
This reading is the forecast point for Castletroy — 2 nearby places use the same point; Castletroy is 2 km from it.
Pollen count Castletroy residents check each morning
The Castletroy pollen count today is 20 (Low). The main driver is Ragweed, with weed pollen at 24 today. The full split is tree pollen 7, grass pollen 4, weed pollen 24. The sections below break that headline number down by plant, by day and by what the band means in practice. Pollen Atlas updated this count on Saturday, November 7, 2026.
A Low band on the Pollen Atlas index means the Total Pollen Index has stayed in the lower part of the 0–100 scale. Readings in this band are built from low individual category values rather than from one large spike, and the category split above matters more than the headline number: a low total can still contain one category, such as weed pollen or mold, reading noticeably higher than the rest, which is why the split is printed on every Castletroy page.
Fall is ragweed season across most of the United States: ragweed plants release pollen from late summer into autumn, and weed pollen is typically the last major outdoor pollen category to fade as the weather cools. That pattern is why an autumn total is so often weed-led even when the headline number is low — tree and grass pollen have usually receded by then, leaving weed pollen, and on damp days mold, to make up most of what the index records.
To see whether today’s pollen level holds, check the 5-day Castletroy pollen forecast below — it is currently mixed, with Sunday the highest day in the window.
This is the pollen count Castletroy residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Castletroy pollen count today?
The Castletroy pollen count today is 20 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Castletroy: this page is updated every morning with the day’s modelled reading.
Castletroy allergies today
Castletroy allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 20 (Low), driven mainly by Ragweed. When people ask about Castletroy allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Castletroy.
Allergies in Castletroy follow the Ireland calendar set out below — the chapters, the plants behind them, and the 5-day forecast on this page show whether today is typical for the season or an exception to it. If you are checking allergies today in Castletroy before heading outdoors, the split at the top of this page is the part to read: it shows which pollen is doing the work today, not just how high the total sits.
Read the five-day table on this page as the Castletroy allergy forecast: today reads 20 (Low), and the day-by-day outlook shows whether Castletroy allergies are set to ease or build across the week — the days to plan outdoor time around are the ones where the index steps down, not just today.
In practice, the allergy count Castletroy today records is this same combined reading — tree, grass, weed and mold in one index.
The Castletroy allergy count today is 20 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Castletroy: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 20 | Low |
| Sunday, November 8 | 21 | Low |
| Monday, November 9 | 21 | Low |
| Tuesday, November 10 | 15 | Low |
| Wednesday, November 11 | 21 | Low |
Pollen Atlas forecasts Castletroy’s pollen count to peak on Sunday at 21 (Low) over the next 5 days.
Pollen by type in Castletroy
What is driving Castletroy’s pollen today
The shape of today’s 20 (Low) is set by weed pollen at 24 (Low on its own scale) — about 69% of the four category readings added together, 17 points clear of the next category, tree pollen at 7. A weed-led total is the classic late-year shape: tree and grass pollen have usually receded, leaving weed pollen — and on damp days mold — to make up most of what the index records. Weed pollen leading in November runs against the usual calendar — the Ireland weed chapter runs August to October — so today’s lead is the model outranking the pattern, and this page reports the modelled reading first.
Plant-level detail is not in today’s feed for Castletroy, so the drivers have to be read from the category split above — it shows how much of today’s total each category is actually carrying, and plant detail returns here automatically on any day the feed includes it.
Across the five-day window the Total Pollen Index runs from 15 to 21, never changing band. Today’s 20 sits 0 points above the window’s average of 19.6 — a moving window, worth reading day by day rather than from the average.
Plants affecting Castletroy now
Detailed plant-by-plant readings for Castletroy were not returned in today\u2019s source data, so this section summarises the pollen types the index above is built from instead of listing individual plants.
Tree pollen is one of the categories with a non-zero reading today, at 7 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 4 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 24 (Low).
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\u2019s measurements.
Plant detail returns here automatically on any day the source data includes it.
Every pollen type, with photos and seasons: the pollen directory.
Castletroy pollen through the year
The Castletroy pollen year runs in chapters, set by the Atlantic West pattern and the Ireland calendar. Trees come first: 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. Grasses take the middle of the year: grasses hold from late May into July, peaking in late spring and early summer. Weeds close it out: weeds are the minor closing act — mugwort through late summer, with ragweed localised and generally light this far west. Mold tracks the region’s Atlantic humidity rather than a flowering calendar, and it fills the gaps between chapters.
No Ireland allergy season guide is published yet, so this page does not single out signature pollens for Castletroy — the calendar above is the Atlantic West regional pattern, and the plant detail on this page names what today’s feed actually records.
November falls between the main chapters of the Ireland pollen year — the tail of one and the approach of the next — so the calendar alone explains little today, and the modelled split above carries the story. Between them, the three chapters cover 9 months of the Ireland year, February to October — leaving a quiet gap of roughly 3 months in the depth of the off-season. No Ireland allergy season guide is published yet — this calendar follows the Atlantic West regional pattern. See Castletroy pollen count rankings and Castletroy on the pollen heatmap.
How to read this index
Pollen Atlas reports the Castletroy pollen count on a Total Pollen Index from 0 to 100, built from separate tree, grass and weed readings. The total is a summary, not an average of the three: a single strong category can lift it, and three quiet categories can hold it down even in a month when Castletroy, Ireland pollen is usually more active. Index values are a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data, with plant detail by the Google Pollen API. The index is a modelled 0–100 scale, not a measured count, and figures update through the day, so a morning and an evening visit to this page can legitimately show different numbers.
Castletroy in today’s national picture
At 20 (Low), Castletroy ranks joint 50955th of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Beja, Portugal at 52, and the lowest is Los Ángeles de San Rafael, Spain at 5. The whole table spans 47 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.
Around Castletroy: Annacotty, Ireland (2 km away) reads 19 (Low); Limerick, Ireland (5 km away) reads 20 (Low); Ardnacrusha, Ireland (6 km away) reads 20 (Low). Castletroy reads 1 point higher than its nearest tracked neighbour today. Across Ireland’s 344 tracked cities, today runs from 13 in Monaghan to 32 in Kilcoole.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Castletroy resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Castletroy, Ireland can test whether tree, grass, weed or mold is the category that matters for you — the four readings at the top of this page are the starting point for that conversation.
Castletroy in its local area
Castletroy is in Limerick City and County Council, Munster, Ireland. Its population is 14,733 (GeoNames).
Castletroy anchors the forecast-point group of 2 places that share this reading. Within the group, Castletroy ranks 1st; across Ireland’s 344 tracked cities, it ranks joint 132nd today.
Like every Pollen Atlas city page, the Castletroy, Ireland pollen count is refreshed each morning.
Nearby cities
- Annacotty pollen count (2 km away)
- Limerick pollen count (5 km away)
- Ardnacrusha pollen count (6 km away)
- Castleconnell pollen count (6 km away)
- Moyross pollen count (6 km away)
- Caherconlish pollen count (11 km away)
From Pollen Atlas News
See how Castletroy ranks in today's pollen count rankings — the worst cities for allergies today
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).