Dayton, OH Pollen Count
Dayton, OH · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Dayton — 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).
Dayton, OH
Weeds Index
How active weeds pollen is today (0–100).
Dayton, OH
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Dayton Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
This reading is the forecast point for Dayton — 2 nearby places use the same point; Dayton is 1.7 km from it.
Pollen count Dayton residents check each morning
The Dayton pollen count today is 22 (Low). The main driver is Ragweed, with weed pollen at 28 today. Weed pollen leads the split at 28 (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 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 Dayton 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 Plains and around the Great Lakes, ragweed is a familiar late-season plant of open ground, field edges and disturbed soil, which is why it so often leads inland autumn readings.
To see whether today’s pollen level holds, check the 5-day Dayton pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Dayton residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Dayton pollen count today?
The Dayton pollen count today is 22 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Dayton: this page is updated every morning with the day’s modelled reading.
Dayton allergies today
Dayton allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 22 (Low), driven mainly by Ragweed. When people ask about Dayton allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Dayton.
Allergies in Dayton follow the Ohio 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 Dayton 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 Dayton allergy forecast: today reads 22 (Low), and the day-by-day outlook shows whether Dayton 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 Dayton today records is this same combined reading — tree, grass, weed and mold in one index.
The Dayton allergy count today is 22 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Dayton: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Friday, November 6 | 22 | Low |
| Saturday, November 7 | 22 | Low |
| Sunday, November 8 | 22 | Low |
| Monday, November 9 | 22 | Low |
| Tuesday, November 10 | 22 | Low |
Pollen Atlas forecasts Dayton’s pollen count to peak on Friday at 22 (Low) over the next 5 days.
Pollen by type in Dayton
What is driving Dayton’s pollen today
The shape of today’s 22 (Low) is set by weed pollen at 28 (Low on its own scale) — about 95% of the four category readings added together, 27 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 Ohio 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 Dayton, so the drivers have to be read from the category split above. The Ohio guide’s account of Ohio names ragweed, the state’s fall heavyweight, over a three-act year — 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 22 to 22, never changing band. Today’s 22 sits level with the window’s average of 22 — a steady window, in which one day reads much like the next.
Plants affecting Dayton now
Detailed plant-by-plant readings for Dayton 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 28 (Low).
In the Midwest & Great Lakes pattern, the plants that typically shape this city’s year are spring trees, late-spring and summer grasses, and late-summer and autumn 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.
Dayton pollen through the year
Three chapters make the Ohio pollen year, and Dayton follows them in the Midwest & Great Lakes order. The tree chapter: trees run from March into May, later near the big lakes. The grass chapter: grasses hold from May through July. The weed chapter: ragweed builds from mid-August, peaks in September, and ends at the first frost. Mold builds through the humid summer and fills the gaps between chapters.
Cleveland’s spring crest typically trails Cincinnati’s, a delay tied to cold Lake Erie water slowing the warm-up along the northern shore. The AAFA cites a striking figure for the fall act: a single ragweed plant can produce up to a billion grains of pollen in one season. The Ohio guide singles out ragweed, the state’s fall heavyweight, over a three-act year.
November falls between the main chapters of the Ohio 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 Ohio year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Ohio allergy season guide.
How to read this index
Pollen Atlas reports the Dayton 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 Dayton, OH 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.
Dayton in today’s national picture
At 22 (Low), Dayton ranks joint 44134th of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Serpa, Portugal at 53, and the lowest is Galiakberovo, Russia at 5. The whole table spans 48 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.
Around Dayton: Shiloh, OH (3 miles away) reads 22 (Low); Fort McKinley, OH (3 miles away) reads 22 (Low); Riverside, OH (4 miles away) reads 23 (Low). Dayton reads exactly level with its nearest tracked neighbour today. Across Ohio’s 1252 tracked cities, today runs from 7 in Edgewood to 32 in Brookville.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Dayton resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Dayton, OH 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.
Dayton in its local area
Dayton is a city in Montgomery County, Ohio. Its population is 136,741 (ACS 2023).
Dayton anchors the forecast-point group of 2 places that share this reading. Within the group, Dayton ranks joint 1st; across Ohio’s 1252 tracked cities, it ranks joint 479th today.
Like every Pollen Atlas city page, the Dayton, OH pollen count is refreshed each morning.
Nearby cities
- Shiloh pollen count (3 miles away)
- Fort McKinley pollen count (3 miles away)
- Riverside pollen count (4 miles away)
- Oakwood pollen count (5 miles away)
- Drexel pollen count (6 miles away)
- Moraine pollen count (6 miles away)
From Pollen Atlas News
See how Dayton ranks in today's pollen count rankings — the worst cities for allergies today
See Dayton on the US pollen map
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).