Peterborough, ON Pollen Count
Peterborough, ON · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Peterborough — 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).
Peterborough, ON
Grass Index
How active grass pollen is today (0–100).
Peterborough, ON
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Peterborough Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Peterborough residents check each morning
The Peterborough pollen count today is 5 (Low). No single plant stands out in today’s readings; the Grass category is the one the index is led by. Tree pollen is the highest single category in the split at 0.6 (Low), ahead of grass pollen at 0.6 and weed pollen at 0.6. 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 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 tree pollen, reading noticeably higher than the rest, which is why the split is printed on every Peterborough page.
Outside its main late-spring and early-summer window, grass pollen usually appears as a small background value rather than the driver of the total. A low grass reading alongside a higher weed or mold value is a typical off-peak pattern. Grass should be read from its own value on this page, not assumed from the calendar: the index reports today’s modelled value, and the modelled value outranks any general seasonal expectation.
To see whether today’s pollen level holds, check the 5-day Peterborough pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Peterborough residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Peterborough pollen count today?
The Peterborough pollen count today is 5 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Grass.
Short answer for anyone searching pollen count today Peterborough: this page is updated every morning with the day’s modelled reading.
Peterborough allergies today
Peterborough allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 5 (Low), driven mainly by Grass. When people ask about Peterborough allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Peterborough.
Allergies in Peterborough follow the Ontario 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 Peterborough 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 Peterborough allergy forecast: today reads 5 (Low), and the day-by-day outlook shows whether Peterborough 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 Peterborough today records is this same combined reading — tree, grass, weed and mold in one index.
The Peterborough allergy count today is 5 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Peterborough: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Friday, November 6 | 5 | Low |
| Saturday, November 7 | 5 | Low |
| Sunday, November 8 | 5 | Low |
| Monday, November 9 | 5 | Low |
| Tuesday, November 10 | 5 | Low |
Pollen Atlas forecasts Peterborough’s pollen count to peak on Friday at 5 (Low) over the next 5 days.
Pollen by type in Peterborough
What is driving Peterborough’s pollen today
The shape of today’s 5 (Low) is set by tree pollen at 0.6 (Low on its own scale) — about 33% of the four category readings added together, level with grass pollen at 0.6. Tree readings are the fastest-moving of the four in their season, because species pollinate in sequence — a tree-led total can change character within a week. Tree pollen leading in November runs against the usual calendar — the Ontario tree chapter runs March to May — 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 Peterborough, so the drivers have to be read from the category split above — it shows how much of today’s total each category is actually carrying, and plant detail returns here automatically on any day the feed includes it.
Across the five-day window the Total Pollen Index runs from 5 to 5, never changing band. Today’s 5 sits level with the window’s average of 5 — a steady window, in which one day reads much like the next.
Plants affecting Peterborough now
Detailed plant-by-plant readings for Peterborough 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 0.6 (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.
Peterborough pollen through the year
The Peterborough pollen year runs in chapters, set by the Midwest & Great Lakes pattern and the Ontario calendar. Trees come first: trees run from March into May, later near the big lakes. Grasses take the middle of the year: grasses hold from May through July. Weeds close it out: 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.
No Ontario allergy season guide is published yet, so this page does not single out signature pollens for Peterborough — the calendar above is the Midwest & Great Lakes regional pattern, and the plant detail on this page names what today’s feed actually records.
November falls between the main chapters of the Ontario 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 Ontario year, March to October — a compressed season, which is why its chapters arrive in quick succession. No Ontario allergy season guide is published yet — this calendar follows the Midwest & Great Lakes regional pattern. See Peterborough pollen count rankings and Peterborough on the pollen heatmap.
How to read this index
Pollen Atlas reports the Peterborough 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 whatever the month. 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.
Peterborough in today’s US & Canada picture
At 5 (Low), Peterborough ranks joint 86157th of the 90896 cities Pollen Atlas tracks today — in the middle of the combined US & Canada table. The highest reading on the combined table 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 Peterborough: Kawartha Lakes, ON (21 miles away) reads 5 (Low); Clarington, ON (32 miles away) reads 5 (Low); Oshawa, ON (37 miles away) reads 22 (Low). Peterborough reads exactly level with its nearest tracked neighbour today. Across Ontario’s 41 tracked cities, today runs from 5 in Ottawa to 34 in Ajax.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Peterborough resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Peterborough, ON 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.
Peterborough in its local area
Peterborough is in Peterborough County, Ontario, Canada. Its population is 85,807 (GeoNames).
Across Ontario’s 41 tracked cities, Peterborough ranks joint 33rd today.
Like every Pollen Atlas city page, the Peterborough, ON pollen count is refreshed each morning.
Nearby cities
- Kawartha Lakes pollen count (21 miles away)
- Clarington pollen count (32 miles away)
- Oshawa pollen count (37 miles away)
- Whitby pollen count (41 miles away)
- Ajax pollen count (46 miles away)
- Belleville pollen count (48 miles away)
From Pollen Atlas News
See how Peterborough 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).