Trujillo Alto, PR Pollen Count
Trujillo Alto, PR · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Trujillo Alto — from Friday, November 6, 2026 (1 day ago) — not today's reading.
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).
Trujillo Alto, PR
Weeds Index
How active weeds pollen is today (0–100).
Trujillo Alto, PR
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Trujillo Alto Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Trujillo Alto residents check each morning
The Trujillo Alto pollen count today is 13 (Low). The main driver is Ragweed, with weed pollen at 14 today. That total sits on a narrow base: weed pollen is 14 while tree pollen is just 12 and grass pollen 10. Plant-by-plant detail for Trujillo Alto, PR follows, along with the outlook for the days ahead. Pollen Atlas updated this count on Friday, November 6, 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 Trujillo Alto 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 Trujillo Alto pollen forecast below — it is currently mixed, with Tuesday the highest day in the window.
This is the pollen count Trujillo Alto residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Trujillo Alto pollen count today?
The Trujillo Alto pollen count today is 13 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Trujillo Alto: this page is updated every morning with the day’s modelled reading.
Trujillo Alto allergies today
Trujillo Alto allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 13 (Low), driven mainly by Ragweed. When people ask about Trujillo Alto allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Trujillo Alto.
Allergies in Trujillo Alto follow the PR 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 Trujillo Alto 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 Trujillo Alto allergy forecast: today reads 13 (Low), and the day-by-day outlook shows whether Trujillo Alto 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 Trujillo Alto today records is this same combined reading — tree, grass, weed and mold in one index.
The Trujillo Alto allergy count today is 13 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Trujillo Alto: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Friday, November 6 | 13 | Low |
| Saturday, November 7 | 15 | Low |
| Sunday, November 8 | 9 | Low |
| Monday, November 9 | 9 | Low |
| Tuesday, November 10 | 21 | Low |
Pollen Atlas forecasts Trujillo Alto’s pollen count to peak on Tuesday at 21 (Low) over the next 5 days.
Pollen by type in Trujillo Alto
What is driving Trujillo Alto’s pollen today
The shape of today’s 13 (Low) is set by weed pollen at 14 (Low on its own scale) — about 39% of the four category readings added together, 2 points clear of the next category, tree pollen at 12. 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 is the PR calendar working as expected — November falls in the closing weeks of the state’s weed chapter.
Plant-level detail is not in today’s feed for Trujillo Alto, 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 9 to 21, never changing band. Today’s 13 sits 0 points below the window’s average of 13.4 — a moving window, worth reading day by day rather than from the average.
Plants affecting Trujillo Alto now
Detailed plant-by-plant readings for Trujillo Alto 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 12 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 10 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 14 (Low).
In the Southeast pattern, the plants that typically shape this city’s year are spring trees, warm-season grasses and late-summer ragweed — 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.
Trujillo Alto pollen through the year
Chapter by chapter, the Trujillo Alto pollen year runs like this:
- Trees can start as early as February and peak in April.
- Grasses follow in May and run through the summer.
- Ragweed runs from mid-August to the first frost.
- Mold is the quiet fourth player, sustained by river-valley humidity between the pollen waves.
No PR allergy season guide is published yet, so this page does not single out signature pollens for Trujillo Alto — the calendar above is the Southeast regional pattern, and the plant detail on this page names what today’s feed actually records.
November in Trujillo Alto sits inside the weed chapter of the PR year, in its closing weeks — the part of the calendar today’s readings should be judged against. Between them, the three chapters cover 10 months of the PR year, February to November — a long season by national standards, with only a short quiet gap. No PR allergy season guide is published yet — this calendar follows the Southeast regional pattern. See Trujillo Alto pollen count rankings and Trujillo Alto on the pollen heatmap.
How to read this index
Pollen Atlas reports the Trujillo Alto 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 Trujillo Alto, PR 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.
Trujillo Alto in today’s national picture
At 13 (Low), Trujillo Alto ranks joint 74300th 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 Trujillo Alto: Carolina, PR (4 miles away) reads 13 (Low); San Juan, PR (5 miles away) reads 14 (Low); La Liga comunidad, PR (5 miles away) reads 8 (Low). Trujillo Alto reads exactly level with its nearest tracked neighbour today. Across PR’s 280 tracked cities, today runs from 7 in Adjuntas zona urbana to 15 in Yauco.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Trujillo Alto resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in Trujillo Alto, PR 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.
Trujillo Alto in its local area
Trujillo Alto is in Trujillo Alto Municipio, Puerto Rico. Its population is 43,752 (ACS 2023).
Across PR’s 280 tracked cities, Trujillo Alto ranks joint 62nd today.
Like every Pollen Atlas city page, the Trujillo Alto, PR pollen count is refreshed each morning.
Nearby cities
- Carolina pollen count (4 miles away)
- San Juan pollen count (5 miles away)
- La Liga comunidad pollen count (5 miles away)
- Caño Martin Peña pollen count (5 miles away)
- Bairoa La Veinticinco comunidad pollen count (7 miles away)
- Santa Bárbara comunidad pollen count (7 miles away)
From Pollen Atlas News
See how Trujillo Alto 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).