Portage, WI Pollen Count
Portage, WI · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Portage — 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).
Portage, WI
Weeds Index
How active weeds pollen is today (0–100).
Portage, WI
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Portage Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Portage residents check each morning
The Portage pollen count today is 21 (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 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 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 Portage 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 Portage pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Portage residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Portage pollen count today?
The Portage pollen count today is 21 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Portage: this page is updated every morning with the day’s modelled reading.
Portage allergies today
Portage allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 21 (Low), driven mainly by Ragweed. When people ask about Portage allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Portage.
Allergies in Portage follow the Wisconsin 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 Portage 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 Portage allergy forecast: today reads 21 (Low), and the day-by-day outlook shows whether Portage 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 Portage today records is this same combined reading — tree, grass, weed and mold in one index.
The Portage allergy count today is 21 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Portage: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Friday, November 6 | 21 | Low |
| Saturday, November 7 | 21 | Low |
| Sunday, November 8 | 17 | Low |
| Monday, November 9 | 12 | Low |
| Tuesday, November 10 | 8 | Low |
Pollen Atlas forecasts Portage’s pollen count to peak on Friday at 21 (Low) over the next 5 days.
Pollen by type in Portage
What is driving Portage’s pollen today
The shape of today’s 21 (Low) is set by weed pollen at 28 (Low on its own scale) — about 96% of the four category readings added together, 27.4 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 Wisconsin 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 Portage, so the drivers have to be read from the category split above. The Wisconsin guide’s account of Wisconsin names oak in the south and birch in the north, and a September ragweed peak over the farmland — 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 8 to 21, never changing band. Today’s 21 sits 5 points above the window’s average of 15.8 — a moving window, worth reading day by day rather than from the average.
Plants affecting Portage now
Detailed plant-by-plant readings for Portage 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 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.
Portage pollen through the year
Three chapters make the Wisconsin pollen year, and Portage 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 Michigan moderates Wisconsin’s eastern shore, delaying spring near the water, while the Northwoods run the state’s latest, shortest season. Kentucky bluegrass — the state’s default lawn and pasture grass — drives a May-to-July grass season that bridges spring and fall. The Wisconsin guide singles out oak in the south and birch in the north, and a September ragweed peak over the farmland.
November falls between the main chapters of the Wisconsin 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 Wisconsin year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Wisconsin allergy season guide.
How to read this index
Pollen Atlas reports the Portage 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 Portage, WI 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.
Portage in today’s national picture
At 21 (Low), Portage ranks joint 47143rd 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 Portage: Dekorra, WI (7 miles away) reads 21 (Low); Pardeeville, WI (8 miles away) reads 22 (Low); Wyocena, WI (9 miles away) reads 22 (Low). Portage reads exactly level with its nearest tracked neighbour today. Across Wisconsin’s 805 tracked cities, today runs from 5 in Wausau to 42 in DeForest.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Portage resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Portage, WI 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.
Portage in its local area
Portage is a city in Columbia County, Wisconsin. Its population is 10,374 (ACS 2023).
Across Wisconsin’s 805 tracked cities, Portage ranks joint 519th today.
Like every Pollen Atlas city page, the Portage, WI pollen count is refreshed each morning.
Nearby cities
- Dekorra pollen count (7 miles away)
- Pardeeville pollen count (8 miles away)
- Wyocena pollen count (9 miles away)
- Briggsville pollen count (10 miles away)
- Poynette pollen count (11 miles away)
- Endeavor pollen count (11 miles away)
From Pollen Atlas News
See how Portage 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).