Harvey, IL Pollen Count
Harvey, IL · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Harvey — 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).
Harvey, IL
Weeds Index
How active weeds pollen is today (0–100).
Harvey, IL
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Harvey Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
This reading is the forecast point for Harvey — 2 nearby places use the same point; Harvey is 3.8 km from it.
Pollen count Harvey residents check each morning
The Harvey pollen count today is 31 (Low). The main driver is Ragweed, with weed pollen at 40 today. That total sits on a narrow base: weed pollen is 40 while tree pollen is just 0.6 and grass pollen 1. Plant-by-plant detail for Harvey, IL follows, along with the outlook for the days ahead. 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 Harvey 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 Harvey pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Harvey residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Harvey pollen count today?
The Harvey pollen count today is 31 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Harvey: this page is updated every morning with the day’s modelled reading.
Harvey allergies today
Harvey allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 31 (Low), driven mainly by Ragweed. When people ask about Harvey allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Harvey.
Allergies in Harvey follow the Illinois 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 Harvey 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 Harvey allergy forecast: today reads 31 (Low), and the day-by-day outlook shows whether Harvey 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 Harvey today records is this same combined reading — tree, grass, weed and mold in one index.
The Harvey allergy count today is 31 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Harvey: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Friday, November 6 | 31 | Low |
| Saturday, November 7 | 30 | Low |
| Sunday, November 8 | 30 | Low |
| Monday, November 9 | 30 | Low |
| Tuesday, November 10 | 29 | Low |
Pollen Atlas forecasts Harvey’s pollen count to peak on Friday at 31 (Low) over the next 5 days.
Pollen by type in Harvey
What is driving Harvey’s pollen today
The shape of today’s 31 (Low) is set by weed pollen at 40 (Low on its own scale) — about 96% of the four category readings added together, 39 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 Illinois 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 Harvey, so the drivers have to be read from the category split above. The Illinois guide’s account of Illinois names the classic tree, grass and ragweed sequence at full strength, with mold as a Chicago co-headliner — 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 29 to 31, never changing band. Today’s 31 sits 1 point above the window’s average of 30 — a steady window, in which one day reads much like the next.
Plants affecting Harvey now
Detailed plant-by-plant readings for Harvey 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 40 (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.
Harvey pollen through the year
Chapter by chapter, the Harvey pollen year runs like this:
- Trees run from March into May, later near the big lakes.
- Grasses hold from May through July.
- 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.
The Illinois allergy season guide names the classic tree, grass and ragweed sequence at full strength, with mold as a Chicago co-headliner. Lake Michigan delays spring flowering near the shore, so downstate Illinois often runs two to three weeks ahead of Chicago in spring — and behind it at the fall frost. The season typically starts in March in the south of the state and April in the Chicago area.
November falls between the main chapters of the Illinois 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 Illinois year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Illinois allergy season guide.
How to read this index
Pollen Atlas reports the Harvey 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 Harvey, IL 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.
Harvey in today’s national picture
At 31 (Low), Harvey ranks joint 14983rd 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 Harvey: Phoenix, IL (1 miles away) reads 32 (Low); Dixmoor, IL (2 miles away) reads 31 (Low); Markham, IL (2 miles away) reads 31 (Low). Harvey reads 1 point lower than its nearest tracked neighbour today. Across Illinois’s 1456 tracked cities, today runs from 14 in Hamburg to 41 in Elburn.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Harvey resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Harvey, IL 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.
Harvey in its local area
Harvey is a city in Cook County, Illinois. Its population is 19,831 (ACS 2023).
Harvey anchors the forecast-point group of 2 places that share this reading. Within the group, Harvey ranks joint 1st; across Illinois’s 1456 tracked cities, it ranks joint 144th today.
Like every Pollen Atlas city page, the Harvey, IL pollen count is refreshed each morning.
Nearby cities
- Phoenix pollen count (1 miles away)
- Dixmoor pollen count (2 miles away)
- Markham pollen count (2 miles away)
- East Hazel Crest pollen count (2 miles away)
- Posen pollen count (2 miles away)
- Riverdale pollen count (3 miles away)
From Pollen Atlas News
See how Harvey 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).