Custer, SD Pollen Count
Custer, SD · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Custer — 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).
Custer, SD
Grass Index
How active grass pollen is today (0–100).
Custer, SD
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Custer Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Custer residents check each morning
The Custer 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 Custer 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 Custer pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Custer residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Custer pollen count today?
The Custer 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 Custer: this page is updated every morning with the day’s modelled reading.
Custer allergies today
Custer 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 Custer allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Custer.
Allergies in Custer follow the South Dakota 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 Custer 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 Custer allergy forecast: today reads 5 (Low), and the day-by-day outlook shows whether Custer 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 Custer today records is this same combined reading — tree, grass, weed and mold in one index.
The Custer allergy count today is 5 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Custer: 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 Custer’s pollen count to peak on Friday at 5 (Low) over the next 5 days.
Pollen by type in Custer
What is driving Custer’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 South Dakota 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 Custer, so the drivers have to be read from the category split above. The South Dakota guide’s account of South Dakota names river-corridor cottonwood, elm and ash in spring, and a divided fall — ragweed in the east, sagebrush in the west — 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 Custer now
Detailed plant-by-plant readings for Custer 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 Northern Plains pattern, the plants that typically shape this city’s year are river-corridor cottonwood, elm and ash in spring, summer grasses, and a divided fall — ragweed in the east, sagebrush in the west — 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.
Custer pollen through the year
The Custer pollen year runs in chapters, set by the Northern Plains pattern and the South Dakota calendar. Trees come first: river-corridor elm, cottonwood and ash open from March in South Dakota, while North Dakota’s trees flower in late spring, in May. Grasses take the middle of the year: grasses run from May into July, peaking in June and July. Weeds close it out: ragweed in the east and sagebrush in the west run from August until the first hard frost.
The South Dakota allergy season guide names river-corridor cottonwood, elm and ash in spring, and a divided fall — ragweed in the east, sagebrush in the west. The Missouri River splits the state into two regimes: a humid, farmed east where ragweed dominates the fall, and a dry, ranched west ruled by sagebrush, wormwood and Russian thistle. The Black Hills run their own cooler, higher calendar, while the southeastern corner around Sioux Falls starts earliest and finishes latest.
November falls between the main chapters of the South Dakota 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 South Dakota year, March to October — a compressed season, which is why its chapters arrive in quick succession. The full calendar is set out in the South Dakota allergy season guide.
How to read this index
Pollen Atlas reports the Custer 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.
Custer in today’s national picture
At 5 (Low), Custer 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 Custer: Pringle, SD (11 miles away) reads 5 (Low); Hill City, SD (12 miles away) reads 5 (Low); Keystone, SD (12 miles away) reads 5 (Low). Custer reads exactly level with its nearest tracked neighbour today. Across South Dakota’s 484 tracked cities, today runs from 5 in Rapid City to 29 in Dell Rapids.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Custer resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Custer, SD 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.
Custer in its local area
Across South Dakota’s 484 tracked cities, Custer ranks joint 440th today.
Like every Pollen Atlas city page, the Custer, SD pollen count is refreshed each morning.
Nearby cities
- Pringle pollen count (11 miles away)
- Hill City pollen count (12 miles away)
- Keystone pollen count (12 miles away)
- Fairburn pollen count (20 miles away)
- Hermosa pollen count (21 miles away)
- Colonial Pine Hills pollen count (22 miles away)
From Pollen Atlas News
See how Custer 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).