Larchmont, NY Pollen Count Today
Larchmont, NY · 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).
Larchmont, NY
Weeds Index
How active weeds pollen is today (0–100).
Larchmont, NY
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Larchmont Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
This reading is the forecast point shared with Mamaroneck, NY — 2 nearby places use the same point; Larchmont is 0.2 km from it.
Pollen count Larchmont residents check each morning
The Larchmont pollen count today is 29 (Low). The main driver is Ragweed, with weed pollen at 38 today. Weed pollen leads the split at 38 (Low on its own scale), followed by grass pollen at 1 and tree pollen at 0.6. Below, the plant detail and the multi-day outlook show whether today is the pattern or the exception. 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 Larchmont 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. In the Northeast, autumn weed pollen typically winds down as colder nights arrive, so late-season totals can change quickly from week to week.
To see whether today’s pollen level holds, check the 5-day Larchmont pollen forecast below — it is currently holding, with Saturday the highest day in the window.
This is the pollen count Larchmont residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Larchmont pollen count today?
The Larchmont pollen count today is 29 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Larchmont: this page is updated every morning with the day’s modelled reading.
Larchmont allergies today
Larchmont allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 29 (Low), driven mainly by Ragweed. When people ask about Larchmont allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Larchmont.
Allergies in Larchmont follow the New York 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 Larchmont 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 Larchmont allergy forecast: today reads 29 (Low), and the day-by-day outlook shows whether Larchmont 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 Larchmont today records is this same combined reading — tree, grass, weed and mold in one index.
The Larchmont allergy count today is 29 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Larchmont: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 29 | Low |
| Sunday, November 8 | 29 | Low |
| Monday, November 9 | 29 | Low |
| Tuesday, November 10 | 28 | Low |
| Wednesday, November 11 | 28 | Low |
Pollen Atlas forecasts Larchmont’s pollen count to peak on Saturday at 29 (Low) over the next 5 days.
Pollen by type in Larchmont
What is driving Larchmont’s pollen today
The shape of today’s 29 (Low) is set by weed pollen at 38 (Low on its own scale) — about 96% of the four category readings added together, 37 points clear of the next category, grass pollen at 1. 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 New York 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 Larchmont, so the drivers have to be read from the category split above. The New York guide’s account of New York names birch and oak, preceded by elm and maple — the pollens behind readings of this shape in this state — and the split shows how much of today’s total each category is actually carrying.
Across the five-day window the Total Pollen Index runs from 28 to 29, never changing band. Today’s 29 sits 0 points above the window’s average of 28.6 — a steady window, in which one day reads much like the next.
Plants affecting Larchmont now
Detailed plant-by-plant readings for Larchmont 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 0.6 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 1 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 38 (Low).
In the Northeast pattern, the plants that typically shape this city’s year are spring trees, late-spring 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.
Larchmont pollen through the year
Three chapters make the New York pollen year, and Larchmont follows them in the Northeast order. The tree chapter: trees open in late March and build to an oak-led peak in May. The grass chapter: grasses hold from late May into July. The weed chapter: ragweed builds from mid-August, peaks in September, and is ended by the first hard frost. Mold tracks the region’s humidity rather than a flowering calendar, and it fills the gaps between chapters.
New York City’s tree season typically opens one to three weeks ahead of Rochester’s, where Lake Ontario’s cold air delays spring along the shore. The AAFA’s 2025 report ranked New York City in the less-challenging half of its 100 metros, reflecting moderate overall burden despite a real spring peak. The New York guide singles out birch and oak, preceded by elm and maple.
November falls between the main chapters of the New York 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 8 months of the New York year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the New York allergy season guide.
How to read this index
Pollen Atlas reports the Larchmont 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 Larchmont, NY 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.
Larchmont in today’s national picture
At 29 (Low), Larchmont ranks joint 18102nd 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 Larchmont: New Rochelle, NY (1 miles away) reads 29 (Low); Mamaroneck, NY (2 miles away) reads 28 (Low); Pelham, NY (3 miles away) reads 29 (Low). Larchmont reads exactly level with its nearest tracked neighbour today. Across New York’s 1289 tracked cities, today runs from 5 in Union to 31 in Walden.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Larchmont resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Larchmont, NY 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.
Larchmont in its local area
Larchmont sits 2 miles west-southwest of Mamaroneck, NY — the anchor of the forecast-point group this reading belongs to. Within the group of 2, Larchmont ranks 1st; across New York’s 1289 tracked cities, it ranks joint 10th today.
Like every Pollen Atlas city page, the Larchmont, NY pollen count is refreshed each morning.
Nearby cities
- New Rochelle pollen count (1 miles away)
- Mamaroneck pollen count (2 miles away)
- Pelham pollen count (3 miles away)
- Pelham Manor pollen count (4 miles away)
- Rye pollen count (4 miles away)
- Eastchester pollen count (4 miles away)
From Pollen Atlas News
See how Larchmont 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).