Sioux City, IA Pollen Count Today
Sioux City, IA · 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).
Sioux City, IA
Weeds Index
How active weeds pollen is today (0–100).
Sioux City, IA
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Sioux City Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Sioux City residents check each morning
The Sioux City 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 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 Sioux City 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 Sioux City pollen forecast below — it is currently holding, with Saturday the highest day in the window.
This is the pollen count Sioux City residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Sioux City pollen count today?
The Sioux City 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 Sioux City: this page is updated every morning with the day’s modelled reading.
Sioux City allergies today
Sioux City 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 Sioux City allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Sioux City.
Allergies in Sioux City follow the Iowa 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 Sioux City 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 Sioux City allergy forecast: today reads 21 (Low), and the day-by-day outlook shows whether Sioux City 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 Sioux City today records is this same combined reading — tree, grass, weed and mold in one index.
The Sioux City allergy count today is 21 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Sioux City: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 21 | Low |
| Sunday, November 8 | 21 | Low |
| Monday, November 9 | 21 | Low |
| Tuesday, November 10 | 21 | Low |
| Wednesday, November 11 | 21 | Low |
Pollen Atlas forecasts Sioux City’s pollen count to peak on Saturday at 21 (Low) over the next 5 days.
Pollen by type in Sioux City
What is driving Sioux City’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 Iowa 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 Sioux City, so the drivers have to be read from the category split above. The Iowa guide’s account of Iowa names ragweed, the state’s dominant allergen, over a maple, oak and hickory spring — 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 21 to 21, never changing band. Today’s 21 sits level with the window’s average of 21 — a steady window, in which one day reads much like the next.
Plants affecting Sioux City now
Detailed plant-by-plant readings for Sioux City 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.
Sioux City pollen through the year
Three chapters make the Iowa pollen year, and Sioux City 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.
Des Moines finished in the top ten of the Asthma and Allergy Foundation of America’s 2024 Allergy Capitals list, reflecting that complete, high-volume calendar. The river valleys are the tree reservoirs: oak-hickory floodplain woodland along the Des Moines, Cedar, Iowa and Mississippi rivers feeds the spring season through valley towns. The Iowa guide singles out ragweed, the state’s dominant allergen, over a maple, oak and hickory spring.
November falls between the main chapters of the Iowa 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 Iowa year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Iowa allergy season guide.
How to read this index
Pollen Atlas reports the Sioux City 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 Sioux City, IA 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.
Sioux City in today’s national picture
At 21 (Low), Sioux City ranks joint 46929th 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 Sioux City: South Sioux City, NE (3 miles away) reads 21 (Low); Dakota Dunes, SD (5 miles away) reads 21 (Low); Dakota City, NE (6 miles away) reads 27 (Low). Sioux City reads exactly level with its nearest tracked neighbour today. Across Iowa’s 1026 tracked cities, today runs from 13 in McGregor to 30 in Grimes.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Sioux City resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Sioux City, IA 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.
Sioux City in its local area
Sioux City is a city in Woodbury County, Iowa. Its population is 85,651 (ACS 2023).
Across Iowa’s 1026 tracked cities, Sioux City ranks joint 956th today.
Like every Pollen Atlas city page, the Sioux City, IA pollen count is refreshed each morning.
Nearby cities
- Sergeant Bluff pollen count (7 miles away)
- Hinton pollen count (10 miles away)
- Lawton pollen count (10 miles away)
- Bronson pollen count (11 miles away)
- Salix pollen count (14 miles away)
- Moville pollen count (16 miles away)
From Pollen Atlas News
See how Sioux City ranks in today's pollen count rankings — the worst cities for allergies today
See Sioux City 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).