Tree Pollen Count in Brighton, CO

Last updated Friday, November 6, 2026

This page shows the most recent reading available for Brighton — from Friday, November 6, 2026 (1 day ago) — not today's reading.

Pollen by type in Brighton

What is the tree pollen count in Brighton today?

The Brighton 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.

Brighton’s overall pollen count today is 27 (Low) across all types. See the full Brighton pollen count for the overall index and every type together.

Brighton is a city spanning Adams County and Weld County in Colorado. Its population is 41,196 (ACS 2023).

Brighton Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 627Low
Saturday, November 725Low
Sunday, November 826Low
Monday, November 926Low
Tuesday, November 1026Low

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 Brighton’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Brighton’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 Brighton now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Brighton. 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.

Brighton allergies today

Brighton allergies today are set by the same reading as the Brighton pollen count today: the Total Pollen Index is 27 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Brighton allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Brighton.

Allergies in Brighton follow the Colorado calendar set out on the full Brighton 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 Brighton 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 Brighton allergy forecast for the tree pollen season: it shows whether Brighton 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 Brighton pollen count — all types, the overall index and today’s ranking context

Brighton grass pollen count

Brighton ragweed pollen count

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

See Brighton on the pollen map

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

Colorado allergy season guide

Tree pollen season

Find an allergist in Brighton, 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).