Ragweed Pollen Count in Fort Collins, CO — Today

Pollen by type in Fort Collins

• Fort Collins tree pollen count
• Fort Collins grass pollen count
• Fort Collins pollen count

What is the ragweed pollen count in Fort Collins today?

The Fort Collins ragweed pollen index today is 23 (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 Fort Collins today. See the full Fort Collins pollen count for the overall index and every type together.

Fort Collins is a city in Larimer County, Colorado. Its population is 169,705 (ACS 2023).

Fort Collins Ragweed Pollen Count: 5-Day Forecast

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 Fort Collins’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Fort Collins’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 23 (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 Fort Collins now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Fort Collins. The type summary stands: ragweed pollen reads 23 (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.

Fort Collins allergies today

Fort Collins allergies today are set by the same reading as the Fort Collins pollen count today: the Total Pollen Index is 18 (Low), and the ragweed pollen index on this page is 23 (Low) of it. When people ask about Fort Collins allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Fort Collins.

Allergies in Fort Collins follow the Colorado calendar set out on the full Fort Collins 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 Fort Collins 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 Fort Collins allergy forecast for the ragweed pollen season: it shows whether Fort Collins 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.