Big Arm, MT Pollen Count
Big Arm, MT · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Big Arm — 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).
Big Arm, MT
Grass Index
How active grass pollen is today (0–100).
Big Arm, MT
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Big Arm Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Big Arm residents check each morning
The Big Arm 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. The full split is tree pollen 0.6, grass pollen 6, 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 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 grass pollen, reading noticeably higher than the rest, which is why the split is printed on every Big Arm 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 Big Arm pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Big Arm residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Big Arm pollen count today?
The Big Arm 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 Big Arm: this page is updated every morning with the day’s modelled reading.
Big Arm allergies today
Big Arm 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 Big Arm allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Big Arm.
Allergies in Big Arm 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 Big Arm 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 Big Arm allergy forecast: today reads 5 (Low), and the day-by-day outlook shows whether Big Arm 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 Big Arm today records is this same combined reading — tree, grass, weed and mold in one index.
The Big Arm allergy count today is 5 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Big Arm: 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 Big Arm’s pollen count to peak on Friday at 5 (Low) over the next 5 days.
Pollen by type in Big Arm
What is driving Big Arm’s pollen today
The shape of today’s 5 (Low) is set by grass pollen at 6 (Low on its own scale) — about 83% of the four category readings added together, 5.4 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 Big Arm, 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 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 Big Arm now
Detailed plant-by-plant readings for Big Arm 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 6 (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.
Big Arm pollen through the year
The Big Arm 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 Big Arm 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.
Big Arm in today’s national picture
At 5 (Low), Big Arm ranks joint 86157th 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 Big Arm: Lindisfarne, MT (3 miles away) reads 5 (Low); Elmo, MT (4 miles away) reads 5 (Low); Dayton, MT (5 miles away) reads 5 (Low). Big Arm reads exactly level with 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 Big Arm resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Big Arm, 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.
Big Arm in its local area
Across Montana’s 496 tracked cities, Big Arm ranks joint 194th today.
Like every Pollen Atlas city page, the Big Arm, MT pollen count is refreshed each morning.
Nearby cities
- Lindisfarne pollen count (3 miles away)
- Elmo pollen count (4 miles away)
- Dayton pollen count (5 miles away)
- Kings Point pollen count (6 miles away)
- Rocky Point pollen count (6 miles away)
- Jette pollen count (6 miles away)
From Pollen Atlas News
See how Big Arm 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).