Chesterbrook, PA Pollen Count Today
Chesterbrook, PA · 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).
Chesterbrook, PA
Weeds Index
How active weeds pollen is today (0–100).
Chesterbrook, PA
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Chesterbrook Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Chesterbrook residents check each morning
The Chesterbrook pollen count today is 21 (Low). The main driver is Ragweed, with weed pollen at 27 today. The full split is tree pollen 0.6, grass pollen 1, weed pollen 27. 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 Chesterbrook 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 Chesterbrook pollen forecast below — it is currently holding, with Saturday the highest day in the window.
This is the pollen count Chesterbrook residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Chesterbrook pollen count today?
The Chesterbrook pollen count today is 21 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Chesterbrook: this page is updated every morning with the day’s modelled reading.
Chesterbrook allergies today
Chesterbrook allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 21 (Low), driven mainly by Ragweed. When people ask about Chesterbrook allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Chesterbrook.
Allergies in Chesterbrook follow the Pennsylvania 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 Chesterbrook 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 Chesterbrook allergy forecast: today reads 21 (Low), and the day-by-day outlook shows whether Chesterbrook 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 Chesterbrook today records is this same combined reading — tree, grass, weed and mold in one index.
The Chesterbrook allergy count today is 21 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Chesterbrook: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 21 | Low |
| Sunday, November 8 | 20 | Low |
| Monday, November 9 | 20 | Low |
| Tuesday, November 10 | 20 | Low |
| Wednesday, November 11 | 20 | Low |
Pollen Atlas forecasts Chesterbrook’s pollen count to peak on Saturday at 21 (Low) over the next 5 days.
Pollen by type in Chesterbrook
What is driving Chesterbrook’s pollen today
The shape of today’s 21 (Low) is set by weed pollen at 27 (Low on its own scale) — about 94% of the four category readings added together, 26 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 Pennsylvania 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 Chesterbrook, so the drivers have to be read from the category split above. The Pennsylvania guide’s account of Pennsylvania names oak, peaking in late April and May, with maple sharing the spring stage — 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 20 to 21, never changing band. Today’s 21 sits 1 point above the window’s average of 20.2 — a steady window, in which one day reads much like the next.
Plants affecting Chesterbrook now
Detailed plant-by-plant readings for Chesterbrook 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 27 (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.
Chesterbrook pollen through the year
The Chesterbrook pollen year runs in chapters, set by the Northeast pattern and the Pennsylvania calendar. Trees come first: trees open in late March and build to an oak-led peak in May. Grasses take the middle of the year: grasses hold from late May into July. Weeds close it out: 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 Pennsylvania allergy season guide names oak, peaking in late April and May, with maple sharing the spring stage. Pittsburgh and the high plateau run measurably later than Philadelphia: springs start later at elevation, and frosts arrive sooner. Cool-season grasses peak in late May and June, and mold joins the count through the humid mid-Atlantic summer.
November falls between the main chapters of the Pennsylvania 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 Pennsylvania year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Pennsylvania allergy season guide.
How to read this index
Pollen Atlas reports the Chesterbrook 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 Chesterbrook, PA 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.
Chesterbrook in today’s national picture
At 21 (Low), Chesterbrook ranks joint 46929th 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 Chesterbrook: Devon, PA (2 miles away) reads 20 (Low); Berwyn, PA (2 miles away) reads 20 (Low); Paoli, PA (3 miles away) reads 18 (Low). Chesterbrook reads 1 point higher than its nearest tracked neighbour today. Across Pennsylvania’s 1957 tracked cities, today runs from 5 in Scranton to 30 in Kutztown University.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Chesterbrook resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Chesterbrook, PA 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.
Chesterbrook in its local area
Across Pennsylvania’s 1957 tracked cities, Chesterbrook ranks joint 278th today.
Like every Pollen Atlas city page, the Chesterbrook, PA pollen count is refreshed each morning.
Nearby cities
- Devon pollen count (2 miles away)
- Berwyn pollen count (2 miles away)
- Paoli pollen count (3 miles away)
- Wayne pollen count (4 miles away)
- Malvern pollen count (4 miles away)
- Oaks pollen count (4 miles away)
From Pollen Atlas News
See how Chesterbrook 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).