Hillsdale, MI Pollen Count Today
Hillsdale, MI · 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).
Hillsdale, MI
Weeds Index
How active weeds pollen is today (0–100).
Hillsdale, MI
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Hillsdale Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Hillsdale residents check each morning
The Hillsdale pollen count today is 17 (Low). The main driver is Ragweed, with weed pollen at 22 today. Weed pollen leads the split at 22 (Low on its own scale), followed by tree pollen at 0.6 and grass 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 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 Hillsdale 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 Hillsdale pollen forecast below — it is currently holding, with Saturday the highest day in the window.
This is the pollen count Hillsdale residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Hillsdale pollen count today?
The Hillsdale 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 Hillsdale: this page is updated every morning with the day’s modelled reading.
Hillsdale allergies today
Hillsdale 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 Hillsdale allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Hillsdale.
Allergies in Hillsdale follow the Michigan 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 Hillsdale 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 Hillsdale allergy forecast: today reads 17 (Low), and the day-by-day outlook shows whether Hillsdale 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 Hillsdale today records is this same combined reading — tree, grass, weed and mold in one index.
The Hillsdale allergy count today is 17 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Hillsdale: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 17 | Low |
| Sunday, November 8 | 17 | Low |
| Monday, November 9 | 17 | Low |
| Tuesday, November 10 | 17 | Low |
| Wednesday, November 11 | 17 | Low |
Pollen Atlas forecasts Hillsdale’s pollen count to peak on Saturday at 17 (Low) over the next 5 days.
Pollen by type in Hillsdale
What is driving Hillsdale’s pollen today
The shape of today’s 17 (Low) is set by weed pollen at 22 (Low on its own scale) — about 95% of the four category readings added together, 21.4 points clear of the next category, tree pollen at 0.6. 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 Michigan 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 Hillsdale, so the drivers have to be read from the category split above. The Michigan guide’s account of Michigan names birch and oak in a compressed late-spring stack, and ragweed as the heavy fall finish — 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 Hillsdale now
Detailed plant-by-plant readings for Hillsdale 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 0.6 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 22 (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.
Hillsdale pollen through the year
Three chapters make the Michigan pollen year, and Hillsdale 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.
Lake moderation delays Michigan’s spring, so birch and oak peaks arrive close together in late spring rather than spread across two months. The AAFA’s research consistently treats the Great Lakes and Ohio Valley as a high-burden region across tree, grass and weed scores. The Michigan guide singles out birch and oak in a compressed late-spring stack, and ragweed as the heavy fall finish.
November falls between the main chapters of the Michigan 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 Michigan year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Michigan allergy season guide.
How to read this index
Pollen Atlas reports the Hillsdale 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 Hillsdale, MI 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.
Hillsdale in today’s national picture
At 17 (Low), Hillsdale 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 Hillsdale: Jonesville, MI (4 miles away) reads 23 (Low); North Adams, MI (6 miles away) reads 28 (Low); Allen, MI (7 miles away) reads 28 (Low). Hillsdale reads 6 points lower than its nearest tracked neighbour today. Across Michigan’s 748 tracked cities, today runs from 5 in Sault Ste. Marie to 36 in Milan.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Hillsdale resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Hillsdale, MI 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.
Hillsdale in its local area
Across Michigan’s 748 tracked cities, Hillsdale ranks joint 493rd today.
Like every Pollen Atlas city page, the Hillsdale, MI pollen count is refreshed each morning.
Nearby cities
- Jonesville pollen count (4 miles away)
- North Adams pollen count (6 miles away)
- Allen pollen count (7 miles away)
- Cambria pollen count (8 miles away)
- Reading pollen count (8 miles away)
- Pittsford pollen count (9 miles away)
From Pollen Atlas News
See how Hillsdale 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).