Ketchum, ID Pollen Count

What is the Ketchum pollen count today?

The Ketchum pollen count today is 18 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Grass.

Short answer for anyone searching pollen count today Ketchum: this page is updated every morning with the day’s modelled reading.

Ketchum allergies today

Ketchum allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 18 (Low), driven mainly by Grass. When people ask about Ketchum allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Ketchum.

Allergies in Ketchum follow the Idaho 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 Ketchum 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 Ketchum allergy forecast: today reads 18 (Low), and the day-by-day outlook shows whether Ketchum 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 Ketchum today records is this same combined reading — tree, grass, weed and mold in one index.

The Ketchum allergy count today is 18 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.

Pollen count today Ketchum: the 5-day forecast

Pollen Atlas forecasts Ketchum’s pollen count to peak on Sunday at 20 (Low) over the next 5 days.

Pollen by type in Ketchum

• Ketchum tree pollen count
• Ketchum grass pollen count
• Ketchum ragweed pollen count

What is driving Ketchum’s pollen today

The shape of today’s 18 (Low) is set by grass pollen at 24 (Low on its own scale) — about 95% of the four category readings added together, 23.4 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 Idaho 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 Ketchum, so the drivers have to be read from the category split above. The Idaho guide’s account of Idaho names sagebrush, the signature weed of the Snake River plain from August through October — 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 18 to 20, never changing band. Today’s 18 sits 0 points below the window’s average of 18.4 — a steady window, in which one day reads much like the next.

Plants affecting Ketchum now

Detailed plant-by-plant readings for Ketchum 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 24 (Low).

Weed pollen is one of the categories with a non-zero reading today, at 0.6 (Low).

In the Mountain West pattern, the plants that typically shape this city’s year are spring trees and late-spring grasses in a compressed warm-season window — 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.

Ketchum pollen through the year

Chapter by chapter, the Ketchum pollen year runs like this:

• Juniper can arrive in late winter, and the main tree wave builds in spring — as late as April at Denver’s altitude.
• Grasses follow in a compressed early-summer run.
• Ragweed and sagebrush-family weeds close the year from late summer.

The Idaho allergy season guide names sagebrush, the signature weed of the Snake River plain from August through October. Southwest Idaho’s working calendar runs trees from February to May, grasses from May to July, and weeds from August — and elevation delays everything, so the eastern high country starts later and ends earlier than the Treasure Valley. The northern panhandle is a different regime — wetter and forested, with pine, cedar and alder in spring and a softer sagebrush presence.

November falls between the main chapters of the Idaho 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 9 months of the Idaho year, February to October — leaving a quiet gap of roughly 3 months in the depth of the off-season. The full calendar is set out in the Idaho allergy season guide.

How to read this index

Pollen Atlas reports the Ketchum 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.

Ketchum in today’s national picture

At 18 (Low), Ketchum ranks joint 56739th 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 Ketchum: Sun Valley, ID (2 miles away) reads 20 (Low); Hailey, ID (13 miles away) reads 5 (Low); Bellevue, ID (16 miles away) reads 5 (Low). Ketchum reads 2 points lower than its nearest tracked neighbour today. Across Idaho’s 236 tracked cities, today runs from 5 in Coeur d'Alene to 29 in Genesee.

Pollen totals are population numbers; symptoms are personal. The same reading can leave one Ketchum resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Ketchum, ID 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.

Ketchum in its local area

Across Idaho’s 236 tracked cities, Ketchum ranks joint 116th today.

Like every Pollen Atlas city page, the Ketchum, ID pollen count is refreshed each morning.

Nearby cities

• Sun Valley pollen count (2 miles away)
• Hailey pollen count (13 miles away)
• Bellevue pollen count (16 miles away)
• Gannett pollen count (25 miles away)
• Fairfield pollen count (32 miles away)
• Carey pollen count (34 miles away)

From Pollen Atlas News

• Idaho allergy season
• Grass pollen season