Ragweed Pollen Count in Centennial, WY — Today

Updated Saturday, November 7, 2026

Pollen by type in Centennial

What is the ragweed pollen count in Centennial today?

The Centennial ragweed pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Centennial’s overall pollen count today is 25 (Low) across all types. See the full Centennial pollen count for the overall index and every type together.

Centennial Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 725Low
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 Centennial’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Centennial’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 0.6 (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 Centennial now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Centennial. The type summary stands: ragweed pollen reads 0.6 (Low) today.

In the High Basins pattern, the plants that typically shape this city’s year are river-corridor cottonwood and juniper, brief-summer meadow grasses, and sagebrush flowering late — 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.

Sagebrush flowers from August into October and peaks in September, and the first hard frost ends it. This month sits outside the usual ragweed pollen window for the High Basins pattern, so today’s ragweed pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Wyoming allergy season guide singles out sagebrush, the state’s signature allergen, flowering from August into October and peaking in September.

Centennial allergies today

Centennial allergies today are set by the same reading as the Centennial pollen count today: the Total Pollen Index is 25 (Low), and the ragweed pollen index on this page is 0.6 (Low) of it. When people ask about Centennial allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Centennial.

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

Centennial tree pollen count

Centennial grass pollen count

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

See Centennial on the pollen map

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

Wyoming allergy season guide

Ragweed season

Find an allergist in Centennial, WY

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).