Ragweed Pollen Count in Highlands Ranch, CO — Today

Updated Saturday, November 7, 2026

Pollen by type in Highlands Ranch

What is the ragweed pollen count in Highlands Ranch today?

The Highlands Ranch ragweed pollen index today is 34 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in Highlands Ranch today. See the full Highlands Ranch pollen count for the overall index and every type together.

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

Highlands Ranch Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 726Low
Sunday, November 825Low
Monday, November 925Low
Tuesday, November 1025Low
Wednesday, November 1125Low

Pollen Atlas models the daily detail as an overall index: day-by-day splits by individual pollen type are not part of the modelled data, so this table shows Highlands Ranch’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Highlands Ranch’s ragweed pollen

Species-level counts are not part of the modelled data Pollen Atlas publishes — the modelled index is reported per pollen type, not per species — so this section gives the type summary: ragweed pollen reads 34 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

How to read this: the “ragweed” figure on this site is the modelled weed pollen index — the weed group (ragweed + mugwort) — printed under the ragweed name the rankings use.

Plants affecting Highlands Ranch now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Highlands Ranch. The type summary stands: ragweed pollen reads 34 (Low) today.

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’s readings.

Plant detail returns here automatically on any day the feed includes it.

What this ragweed pollen level means

Low risk. Keep windows open; consider allergy meds only if sensitive.

Enjoy outdoor activities.

Ragweed and sagebrush-family weeds close the year from late summer. This month sits outside the usual ragweed pollen window for the Mountain West pattern, so today’s ragweed pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Colorado allergy season guide singles out juniper, arriving ahead of the local tree season, and the ragweed and sagebrush-family weeds of late summer.

Highlands Ranch allergies today

Highlands Ranch allergies today are set by the same reading as the Highlands Ranch pollen count today: the Total Pollen Index is 26 (Low), and the ragweed pollen index on this page is 34 (Low) of it. When people ask about Highlands Ranch allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Highlands Ranch.

Allergies in Highlands Ranch follow the Colorado calendar set out on the full Highlands Ranch page — the chapters, the plants behind them, and the 5-day forecast 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 ragweed pollen split on this page is the part to read: it shows whether this pollen type is doing the work today, not just how high the total sits.

Read the five-day overall trend above as the Highlands Ranch allergy forecast for the ragweed pollen season: it shows whether Highlands Ranch allergies are set to ease or build across the week, day by day — the days to plan outdoor time around are the ones where the overall index steps down, not just today.

See the full Highlands Ranch pollen count — all types, the overall index and today’s ranking context

Highlands Ranch tree pollen count

Highlands Ranch grass pollen count

See how Highlands Ranch ranks in today's pollen count rankings — the worst cities for allergies today

See Highlands Ranch on the pollen map

Every pollen type, with photos and seasons: the pollen directory

Colorado allergy season guide

Ragweed season

Find an allergist in Highlands Ranch, CO

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).