West Yellowstone, MT Pollen Count Today
West Yellowstone, MT · 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).
West Yellowstone, MT
Grass Index
How active grass pollen is today (0–100).
West Yellowstone, MT
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day West Yellowstone Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count West Yellowstone residents check each morning
The West Yellowstone pollen count today is 16 (Low). No single plant stands out in today’s readings; the Grass category is the one the index is led by. The full split is tree pollen 0.6, grass pollen 21, weed pollen 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 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 grass pollen, reading noticeably higher than the rest, which is why the split is printed on every West Yellowstone 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 West Yellowstone pollen forecast below — it is currently holding, with Sunday the highest day in the window.
This is the pollen count West Yellowstone residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the West Yellowstone pollen count today?
The West Yellowstone pollen count today is 16 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Grass.
Short answer for anyone searching pollen count today West Yellowstone: this page is updated every morning with the day’s modelled reading.
West Yellowstone allergies today
West Yellowstone allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 16 (Low), driven mainly by Grass. When people ask about West Yellowstone allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for West Yellowstone.
Allergies in West Yellowstone follow the Montana 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 West Yellowstone 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 West Yellowstone allergy forecast: today reads 16 (Low), and the day-by-day outlook shows whether West Yellowstone 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 West Yellowstone today records is this same combined reading — tree, grass, weed and mold in one index.
The West Yellowstone allergy count today is 16 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today West Yellowstone: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 16 | Low |
| Sunday, November 8 | 18 | Low |
| Monday, November 9 | 18 | Low |
| Tuesday, November 10 | 18 | Low |
| Wednesday, November 11 | 18 | Low |
Pollen Atlas forecasts West Yellowstone’s pollen count to peak on Sunday at 18 (Low) over the next 5 days.
Pollen by type in West Yellowstone
What is driving West Yellowstone’s pollen today
The shape of today’s 16 (Low) is set by grass pollen at 21 (Low on its own scale) — about 95% of the four category readings added together, 20.4 points clear of the next category, tree pollen at 0.6. Grass-led totals tend to hold a level for days at a time rather than spike and clear, because grasses pollinate over an extended period. Grass pollen leading in November runs against the usual calendar — the Montana grass chapter runs May to July — 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 West Yellowstone, so the drivers have to be read from the category split above. The Montana guide’s account of Montana names sagebrush, flowering late on the dry benches, over a grass summer of timothy, orchard grass, bluegrass and ryegrass — 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 16 to 18, never changing band. Today’s 16 sits 2 points below the window’s average of 17.6 — a steady window, in which one day reads much like the next.
Plants affecting West Yellowstone now
Detailed plant-by-plant readings for West Yellowstone 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 21 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 0.6 (Low).
In the Northern Rockies pattern, the plants that typically shape this city’s year are river-corridor trees, a June grass crest of timothy, orchard grass, bluegrass and ryegrass, and a late sagebrush finish — 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.
West Yellowstone pollen through the year
The West Yellowstone pollen year runs in chapters, set by the Northern Rockies pattern and the Montana calendar. Trees come first: river-corridor trees open in late March or April, varying by valley elevation, and run into May. Grasses take the middle of the year: grasses run from May through July with a June crest, when the hay grasses flower together. Weeds close it out: ragweed, sagebrush, wormwood and pigweed run from August until the first hard frost, typically in October.
The Montana allergy season guide names sagebrush, flowering late on the dry benches, over a grass summer of timothy, orchard grass, bluegrass and ryegrass. Valley inversions in western Montana can hold pollen close to town on still mornings, even under famously big, clean-looking skies. Western valleys run a tree-and-grass calendar shaped by rivers and elevation, while the eastern plains add a stronger wind-blown weed and sagebrush finish.
November falls between the main chapters of the Montana 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 Montana year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the Montana allergy season guide.
How to read this index
Pollen Atlas reports the West Yellowstone 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.
West Yellowstone in today’s national picture
At 16 (Low), West Yellowstone ranks joint 65321st 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 West Yellowstone: Hebgen Lake Estates, MT (8 miles away) reads 22 (Low); Island Park, ID (14 miles away) reads 16 (Low); Mammoth, WY (30 miles away) reads 25 (Low). West Yellowstone reads 6 points lower than its nearest tracked neighbour today. Across Montana’s 496 tracked cities, today runs from 5 in Missoula to 29 in Sidney.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one West Yellowstone resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in West Yellowstone, MT 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.
West Yellowstone in its local area
Across Montana’s 496 tracked cities, West Yellowstone ranks joint 70th today.
Like every Pollen Atlas city page, the West Yellowstone, MT pollen count is refreshed each morning.
Nearby cities
- Hebgen Lake Estates pollen count (8 miles away)
- Gardiner pollen count (32 miles away)
- Lakeview pollen count (35 miles away)
- Corwin Springs pollen count (36 miles away)
- Jardine pollen count (36 miles away)
- Big Sky pollen count (43 miles away)
From Pollen Atlas News
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).