Harleyville, SC Pollen Count Today
Harleyville, SC · 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).
Harleyville, SC
Weeds Index
How active weeds pollen is today (0–100).
Harleyville, SC
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Harleyville Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Harleyville residents check each morning
The Harleyville pollen count today is 18 (Low). The main driver is Ragweed, with weed pollen at 20 today. The full split is tree pollen 19, grass pollen 3, weed pollen 20. 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 Harleyville 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 Harleyville pollen forecast below — it is currently holding, with Saturday the highest day in the window.
This is the pollen count Harleyville residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Harleyville pollen count today?
The Harleyville pollen count today is 18 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Harleyville: this page is updated every morning with the day’s modelled reading.
Harleyville allergies today
Harleyville allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 18 (Low), driven mainly by Ragweed. When people ask about Harleyville allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Harleyville.
Allergies in Harleyville follow the South Carolina 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 Harleyville 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 Harleyville allergy forecast: today reads 18 (Low), and the day-by-day outlook shows whether Harleyville 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 Harleyville today records is this same combined reading — tree, grass, weed and mold in one index.
The Harleyville allergy count today is 18 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Harleyville: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 18 | Low |
| Sunday, November 8 | 18 | Low |
| Monday, November 9 | 18 | Low |
| Tuesday, November 10 | 17 | Low |
| Wednesday, November 11 | 17 | Low |
Pollen Atlas forecasts Harleyville’s pollen count to peak on Saturday at 18 (Low) over the next 5 days.
Pollen by type in Harleyville
What is driving Harleyville’s pollen today
The shape of today’s 18 (Low) is set by weed pollen at 20 (Low on its own scale) — about 48% of the four category readings added together, 1 points clear of the next category, tree pollen at 19. 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 South Carolina 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 Harleyville, so the drivers have to be read from the category split above. The South Carolina guide’s account of South Carolina names oak — the pine dust filming cars in the same weeks is a comparatively weak allergen — 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 18, never changing band. Today’s 18 sits 0 points above the window’s average of 17.6 — a steady window, in which one day reads much like the next.
Plants affecting Harleyville now
Detailed plant-by-plant readings for Harleyville 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 19 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 3 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 20 (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.
Harleyville pollen through the year
The Harleyville pollen year runs in chapters, set by the Southeast pattern and the South Carolina calendar. Trees come first: trees can start as early as February and peak in April. Grasses take the middle of the year: grasses follow in May and run through the summer. Weeds close it out: ragweed runs from mid-August to the first frost. Mold is the quiet fourth player, sustained by river-valley humidity between the pollen waves.
The South Carolina allergy season guide names oak — the pine dust filming cars in the same weeks is a comparatively weak allergen. South Carolina’s season opens in February in warm years and can still be going in November in the southern half of the state; Greenville ranked ninth in the AAFA’s 2025 Allergy Capitals report. Warm-season grasses such as Bermuda grass pollinate from late spring deep into summer, with mold layered over the humid middle of the year.
November in Harleyville sits inside the weed chapter of the South Carolina 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 South Carolina year, February to November — a long season by national standards, with only a short quiet gap. The full calendar is set out in the South Carolina allergy season guide.
How to read this index
Pollen Atlas reports the Harleyville 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 Harleyville, SC 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.
Harleyville in today’s national picture
At 18 (Low), Harleyville ranks joint 57574th 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 Harleyville: St. George, SC (8 miles away) reads 18 (Low); Holly Hill, SC (8 miles away) reads 18 (Low); Grover, SC (11 miles away) reads 18 (Low). Harleyville reads exactly level with its nearest tracked neighbour today. Across South Carolina’s 472 tracked cities, today runs from 13 in Keowee Key to 28 in Hamer.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Harleyville resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in Harleyville, SC 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.
Harleyville in its local area
Across South Carolina’s 472 tracked cities, Harleyville ranks joint 119th today.
Like every Pollen Atlas city page, the Harleyville, SC pollen count is refreshed each morning.
Nearby cities
- St. George pollen count (8 miles away)
- Holly Hill pollen count (8 miles away)
- Grover pollen count (11 miles away)
- Reevesville pollen count (11 miles away)
- Ridgeville pollen count (12 miles away)
- Eutawville pollen count (14 miles away)
From Pollen Atlas News
See how Harleyville 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).