Carbondale, Colorado pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Carbondale, Colorado is moderate; ragweed is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) ragweed remains moderate, mugwort at low levels.
7-Day Trend
Over the next week mugwort and ragweed will decrease; grass will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Moderate | 26/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 9/100 | |
| Ragweed (Ambrosia) | Moderate | 42/100 |
Local Environmental Conditions
The vegetation around Carbondale, on the Roaring Fork Valley beneath Mount Sopris, is dominated by cottonwood along the river and aspen groves, with sagebrush hillsides adding further seasonal pollen exposure. Local parks and open ground tend to see higher pollen counts than the denser urban core. Microclimates within the area can shift the timing slightly from one neighborhood to the next.
Carbondale's tree pollen season begins with juniper and cottonwood from March with ash following close behind through April. Peak grass pollen arrives in May and June, and grass pollen lingers into early September before tapering off. The dry mountain climate offers fewer rain breaks than more humid parts of the country throughout the year.
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Frequently Asked Questions About Pollen in Colorado
Is pollen high in Carbondale, Colorado right now?
On 20 September 2026, overall pollen levels in Carbondale, Colorado are moderate. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Carbondale, Colorado tomorrow?
On 21 September 2026, pollen conditions in Carbondale, Colorado will be different from today, with ambrosia at moderate levels, artemisia at low levels
Is pollen expected to decrease in Carbondale, Colorado this week?
According to the five-day outlook, ambrosia and artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Carbondale, Colorado?
On 20 September 2026, Ambrosia is the dominant pollen source in Carbondale, Colorado. grass and artemisia are not currently active.
When is pollen season in Carbondale, Colorado?
How often is the Carbondale, Colorado pollen forecast updated?
The Carbondale, Colorado pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Carbondale, Colorado come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Carbondale, Colorado based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Carbondale, Colorado, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
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Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
