Highlands Ranch, CO Pollen Count

What is the Highlands Ranch pollen count today?

The Highlands Ranch pollen count today is 24 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.

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

Highlands Ranch allergies today

Highlands Ranch allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 24 (Low), driven mainly by Ragweed. When people ask about Highlands Ranch allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Highlands Ranch.

Allergies in Highlands Ranch follow the Colorado 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 Highlands Ranch 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 Highlands Ranch allergy forecast: today reads 24 (Low), and the day-by-day outlook shows whether Highlands Ranch 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 Highlands Ranch today records is this same combined reading — tree, grass, weed and mold in one index.

The Highlands Ranch allergy count today is 24 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.

Pollen count today Highlands Ranch: the 5-day forecast

Pollen Atlas forecasts Highlands Ranch’s pollen count to peak on Saturday at 26 (Low) over the next 5 days.

Pollen by type in Highlands Ranch

• Highlands Ranch tree pollen count
• Highlands Ranch grass pollen count
• Highlands Ranch ragweed pollen count

What is driving Highlands Ranch’s pollen today

The shape of today’s 24 (Low) is set by weed pollen at 31 (Low on its own scale) — about 96% of the four category readings added together, 30.4 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 Colorado 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 Highlands Ranch, so the drivers have to be read from the category split above. The Colorado guide’s account of Colorado names juniper, arriving ahead of the local tree season, and the ragweed and sagebrush-family weeds of late summer — 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 24 to 26, never changing band. Today’s 24 sits 1 point below the window’s average of 25 — a steady window, in which one day reads much like the next.

Plants affecting Highlands Ranch now

Detailed plant-by-plant readings for Highlands Ranch 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 31 (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.

Highlands Ranch pollen through the year

Chapter by chapter, the Highlands Ranch 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 Colorado allergy season guide names juniper, arriving ahead of the local tree season, and the ragweed and sagebrush-family weeds of late summer. Altitude compresses Colorado’s season rather than removing it: the waves arrive late — Denver’s tree pollen typically builds in April — and end with early frosts, but they run in a tight sequence. The season ends with the first hard frosts, which stop the late-summer weeds — Denver usually reaches frost in fall, while mountain towns can frost far earlier.

November falls between the main chapters of the Colorado 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 Colorado 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 Colorado allergy season guide.

How to read this index

Pollen Atlas reports the Highlands Ranch 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.

Highlands Ranch in today’s national picture

At 24 (Low), Highlands Ranch ranks joint 39349th 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 Highlands Ranch: Acres Green, CO (4 miles away) reads 19 (Low); Littleton, CO (4 miles away) reads 23 (Low); Louviers, CO (5 miles away) reads 24 (Low). Highlands Ranch reads 5 points higher than its nearest tracked neighbour today. Across Colorado’s 479 tracked cities, today runs from 5 in Parker to 32 in Dillon.

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

Highlands Ranch in its local area

Highlands Ranch is a census-designated place in Douglas County, Colorado. Its population is 101,437 (ACS 2023).

Across Colorado’s 479 tracked cities, Highlands Ranch ranks joint 128th today.

Like every Pollen Atlas city page, the Highlands Ranch, CO pollen count is refreshed each morning.

Nearby cities

• Acres Green pollen count (4 miles away)
• Littleton pollen count (4 miles away)
• Louviers pollen count (5 miles away)
• Columbine Valley pollen count (5 miles away)
• Sterling Ranch pollen count (5 miles away)
• Lone Tree pollen count (5 miles away)

From Pollen Atlas News

• Colorado allergy season
• Ragweed season