Port Chester, NY Pollen Count Today

What is the Port Chester pollen count today?

The Port Chester pollen count today is 17 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.

Short answer for anyone searching pollen count today Port Chester: this page is updated every morning with the day’s modelled reading.

Port Chester allergies today

Port Chester allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 17 (Low), driven mainly by Ragweed. When people ask about Port Chester allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Port Chester.

Allergies in Port Chester 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 Port Chester 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 Port Chester allergy forecast: today reads 17 (Low), and the day-by-day outlook shows whether Port Chester 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 Port Chester today records is this same combined reading — tree, grass, weed and mold in one index.

The Port Chester allergy count today is 17 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.

Pollen count today Port Chester: the 5-day forecast

Pollen Atlas forecasts Port Chester’s pollen count to peak on Saturday at 17 (Low) over the next 5 days.

Pollen by type in Port Chester

• Port Chester tree pollen count
• Port Chester grass pollen count
• Port Chester ragweed pollen count

What is driving Port Chester’s pollen today

The shape of today’s 17 (Low) is set by weed pollen at 22 (Low on its own scale) — about 93% of the four category readings added together, 21 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 Port Chester, 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 17 to 17, never changing band. Today’s 17 sits level with the window’s average of 17 — a steady window, in which one day reads much like the next.

Plants affecting Port Chester now

Detailed plant-by-plant readings for Port Chester 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 22 (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.

Port Chester pollen through the year

Chapter by chapter, the Port Chester pollen year runs like this:

• Trees open in late March and build to an oak-led peak in May.
• Grasses hold from late May into July.
• 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.

The New York allergy season guide names birch and oak, preceded by elm and maple. 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.

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 Port Chester 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 Port Chester, 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.

Port Chester in today’s national picture

At 17 (Low), Port Chester ranks joint 61701st 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 Port Chester: Byram, CT (1 miles away) reads 17 (Low); Pemberwick, CT (1 miles away) reads 17 (Low); Rye Brook, NY (2 miles away) reads 17 (Low). Port Chester 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 Port Chester resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Port Chester, 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.

Port Chester in its local area

Port Chester is a village in Westchester County, New York. Its population is 31,162 (ACS 2023).

Across New York’s 1289 tracked cities, Port Chester ranks joint 210th today.

Like every Pollen Atlas city page, the Port Chester, NY pollen count is refreshed each morning.

Nearby cities

• Rye Brook pollen count (2 miles away)
• Harrison pollen count (3 miles away)
• Rye pollen count (4 miles away)
• White Plains pollen count (5 miles away)
• Mamaroneck pollen count (6 miles away)
• Scarsdale pollen count (6 miles away)

From Pollen Atlas News

• New York allergy season
• Ragweed season