Tree Pollen Count in Highlands Ranch, CO
Last updated Friday, November 6, 2026
This page shows the most recent reading available for Highlands Ranch — from Friday, November 6, 2026 (1 day ago) — not today's reading.
Pollen by type in Highlands Ranch
What is the tree pollen count in Highlands Ranch today?
The Highlands Ranch tree pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low
Modelled pollen risk index — not a measured count.
Highlands Ranch’s overall pollen count today is 24 (Low) across all types. 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 Tree Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Friday, November 6 | 24 | Low |
| Saturday, November 7 | 26 | Low |
| Sunday, November 8 | 25 | Low |
| Monday, November 9 | 25 | Low |
| Tuesday, November 10 | 25 | Low |
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 tree pollen reading is the headline above.
Species driving Highlands Ranch’s tree 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: tree pollen reads 0.6 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.
Plants affecting Highlands Ranch now — tree pollen
Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Highlands Ranch. The type summary stands: tree pollen reads 0.6 (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 tree pollen level means
Low risk. Keep windows open; consider allergy meds only if sensitive.
Enjoy outdoor activities.
Juniper can arrive in late winter, and the main tree wave builds in spring — as late as April at Denver’s altitude. This month sits outside the usual tree pollen window for the Mountain West pattern, so today’s tree 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 24 (Low), and the tree pollen index on this page is 0.6 (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 tree 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 tree 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 grass pollen count
Highlands Ranch ragweed pollen count
See Highlands Ranch on the pollen map
Every pollen type, with photos and seasons: the pollen directory
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).